Which sentence contains a misplaced or dangling modifier?

A) When will your family be going on vacation?
B) Uncle Frasier's garden has both tomatoes and green peppers.
C) The homecoming queen waved to the crowd riding in her convertible.
D) Exhausted from the trip, the baby slept through the opening ceremony.

I am so confused. But I think it might be d.

No.

Who was riding in the convertible?