A University of Colorado a cappella group has revised its audition form after acknowledging that a question ridiculing the victim of Monday's campus stabbing was inappropriate and a "big mistake."

Singers auditioning for the all-men's student group the Buffoons on Tuesday were asked a multiple-choice question about how they felt after the previous day's random attack, which sent a 17-year-old freshman to the hospital with a slashed neck.

Applicants were given these answers to choose from:

A. Confused

B. Dazed and confused

C. Mad someone got that guy before you did

The Buffoons, a CU student group and a nonprofit organization, was founded in 1962, making it one of the oldest and most established a cappella groups in the country.

Last week, the group performed at a ceremony welcoming freshmen to the campus. During the convocation — which was mandatory for CU's 5,600 freshmen — members of the Buffoons led the new students in singing the school's alma mater.

The group's questionnaire irked at least one student who auditioned, prompting the musicians by Wednesday to clean up the form. Upon learning about the questionnaire's contents, campus officials called it "insensitive."

All of the "offensive" questions have been removed, said Colin Birkhead, business manager for the Buffoons. Auditions for the group are going on this week.

The questionnaire also asked candidates if they knew where the "female clitoris" is and instructed them to "feel free to draw a diagram."

"We are a group with maybe a little more extreme sense of humor," said Birkhead, a senior at CU. "We weren't meaning to offend anyone. It was a big mistake."

Birkhead said he did not author the questions on the form but didn't want to place blame on any group member.

CU spokesman Bronson Hilliard said the Buffoons have had an upstanding reputation on the campus over the years. He said the audition form was "insensitive" and "unnecessary."

"Why would they want to sully that with something so stupid at a time when the campus is trying to recover from trauma?" Hilliard said.

The campus has otherwise shown support for Michael Knorps, the student who was stabbed outside of the University Memorial Center.

Kenton Astin, 39, is accused of jumping the new student, cutting his neck and then threatening to detonate a bomb using his cell phone, police and witnesses said. When police arrived, they said, Astin stabbed himself in the chest repeatedly until officers hit him with a Taser stun gun.

When Knorps' parents stepped off the train at Denver International Airport on Monday, CU Chancellor Bud Peterson was waiting to escort them to Boulder.

Students have scrawled notes across the white board outside the student's dorm room, and thousands of people have signed over-sized poster boards. The students have also started an online group at Facebook.com cheering for Knorps' recovery.

Hilliard said administrators will likely make a phone call to the Buffoons, communicating that they expect more from them.

"You don't need nonsense like that in an application for an a cappella group," he said. "They need to learn from that. You don't just say whatever you want because you can."

The Buffoons have performed for the Colorado Rockies, Denver Nuggets and an annual CU a cappella charity fundraiser called Acappellooza.