Which pair of ratios can form a true proportion?

Question

A: 7/4,21/12 (I CHOOSE THIS)
B: 6/3,5/6
C: 7/10,6/7
D: 3/5,7/12

Pls help

Answer 1

My answer hasn't changed since I posted it for you last night.

http://www.jiskha.com/display.cgi?id=1449973386