Which sentence contains an inappropriate shift in tense?

A.

By the time the sun set, I will have been working for eight hours.

B.
When the summer ends, that swimsuit will have been worn hundreds of times.

C.
As long as we travel together, we will have a wonderful time.

Question

Which sentence contains an inappropriate shift in tense? 	
	
 
A.
	

By the time the sun set, I will have been working for eight hours.
	
 
B.
	When the summer ends, that swimsuit will have been worn hundreds of times.
	
 
C.
	As long as we travel together, we will have a wonderful time.

anonymous · Answer

C.
	As long as we travel together, we will have a wonderful time.  again not sure but i think so

anonymous · Answer

Thank you