Which equation has no solution?

A. 2.3y + 2 +3.1y = 4.3y + 1.6 + 1.1y + 0.4
B. 32x + 25 - 21x = 10x
C. 5/8x + 2.5 = 3/8x + 1.5 + 1/4x
D. 1/3 + 1/7y = 3/7y


SOMEONE PLEASE HELP ME I HAVE NO IDEA