Which sentence contains an inappropriate shift in tense?

A.
Has Eric seen the puppies, or are you saving them for a surprise?

B.
As the wagon was rolling down the hill, a rear wheel breaks, and Tom yells, "Whoa!

C.
Before you go out, will you read a story to your sister?

Question

Which sentence contains an inappropriate shift in tense?	
 
 A.
Has Eric seen the puppies, or are you saving them for a surprise?
 
 B.
As the wagon was rolling down the hill, a rear wheel breaks, and Tom yells, "Whoa!
 
 C.
Before you go out, will you read a story to your sister?

anonymous · Answer

Which one do you think is the answer?

anonymous · Answer

look for the one with incorrect grammar.

anonymous · Answer

Just read the sentences instead of copying and pasting them here

anonymous · Answer

B stands out to me because of "was rolling" and "wheel breaks." Those are two different tenses.