Which sentence contains a dangling modifier?

A.
Upon hearing the fire engines, the apartment building was evacuated.

B.
When operating heavy machinery, one must use caution.

C.
Upon bestowing the awards, the mayor congratulated all the participants.

D.
Upon taking the field, the player was hit by a foul ball.

Question

Which sentence contains a dangling modifier?	
 
 A.
Upon hearing the fire engines, the apartment building was evacuated.
 
 B.
When operating heavy machinery, one must use caution.
 
 C.
Upon bestowing the awards, the mayor congratulated all the participants.
 
 D.
Upon taking the field, the player was hit by a foul ball.

solidicecream · Answer

I say its Upon hearing the fire engines, the apartment building was evacuated.

anonymous · Answer

@SolidIceCream Could ya help me with this too? I think it's frozen. Which word does the participle modify? 

Trembling with fear, the small rabbit stood frozen in the car's headlights.
 
 A.
fear
 
 B.
rabbit
 
 C.
frozen
 
 D.
car's

solidicecream · Answer

I say its B rabbit if you have any doubt you can always check your lesson and notes.