Which sentence has an error involving a dangling modifier?

A)
Walking back from the college recruitment office, my backpack was stolen.

B)
Excited about seeing her favorite band in concert, Krystal couldn't sleep
the night before.

C)Miserable about having to attend Saturday school, Andrea swore she'd
never skip class again.

D)Shy about asking a teacher to be her mentor, Tessa refused to ask any
teacher for assistance