PLS PLS PLS HELP!!!

The perimeter of a square is given as 6c - 4(c-5) Which expression give the length of one side of the square?

A 2c + 20
B 1/2c + 20
C 1/2c+5
D 8c+20

Are the two expressions, 6c-4(c-5) and the answer you chose to the
question above equivalent?
Explain why or why not in 1 to 2 sentences.