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.

The correct sentence would be (C) The décor of the men's room looked like it had not been changed since the 1970's.

Just for your info, in British English, you do not put an apostrophe in dates, so it would be 1970s. In American English we do put the apostrophe.

themes  are central to understanding a  midsummer night's dream  as a play and identifying shakespeare's social and political commentary. the dominant  theme  in a mid summer night's dream  is love, a subject to which shakespeare returns constantly in his comedies.

hope this

a

explanation: