Stupid vs. 100

I am home working on some calculus homework for the class I'm TAing, and Robert's watching the TV game show 1 vs. 100. Just so you're aware of how it works, they ask a general knowledge question to a 'mob' of 100 people, and then a single competitor. The 1 person then faces off against everybody that got it correct in the next question. This continues until the entire mob is eliminated, the 1 person gets a question wrong, or the 1 person stops.

In this episode, a (stupid) girl faced off against 100 guys. After reducing the mob down to 44, after correctly guessing that Sy Sperling founded the Hair Club for Men, she was faced with a different type of question.

A prime number is in the title of which of the following movie?
A.) Scary Movie 4
B.) Ocean's 11
C.) Police Academy 6: City Under Siege


She had no idea. She said that she thought it was a number that was multiplied twice. She used a help, listening to a guy that guessed correctly, and listening to a guy that guessed incorrectly. This narrowed it down to A and B. She picked A.

A Prime Number!!! Come on!!! A prime number is a number that is only divisible by 1 and itself. Now please, nobody else make this egregious error.