Question

Which sentence uses apostrophes correctly?

A. 

The décor of the mens room looked like it had not been changed since the 1970’s. B. The décor of the men’s room looked like it had not been changed since the 1970s. C.  The décor of the mens’ room looked like it had not been changed since the 1970’s.

Answer 1

B. is correct because you do not put apostrophes when writing the year like it is written here