Question

Use the future perfect progressive form of play to complete the following sentence. I _____ guitar for six years this coming May.
A:will have been playing  

B:have been playing

C:am playing

D:was playing

Answer 1

It would make the most sense if it is 
I will have been playing guitar for six years this coming May.
Keeping in mind that it hasn't happened yet. 
So, the answer is A.