Which sentence contains an inappropriate shift in tense?

A.
When Wednesday rolls around, this room will have been cleaned from top to bottom.

B.
When that alarm will go off, I will have been studying for five whole hours.

C.
As soon as Dad arrives in Phoenix, he will call and let us know.

I know for sure it's not C, please help!

Question

Which sentence contains an inappropriate shift in tense?	
 
 A.
When Wednesday rolls around, this room will have been cleaned from top to bottom.
 
 B.
When that alarm will go off, I will have been studying for five whole hours.
 
 C.
As soon as Dad arrives in Phoenix, he will call and let us know.

I know for sure it's not C, please help!

anonymous · Answer

@SolomonZelman  I can't decide between A or B, can you help?

nevermind_justschool · Answer

B.

anonymous · Answer

b

anonymous · Answer

@SolomonZelman What do you think, is it B?