Need answered***

Choose the correct ratio for: 7 yards to 15 feet
(I know its not B)
A: 15/7
B: 7/15
C: 15/21
D: 21/15

Choose the correct ratio for: 6 feet to 18 inches
(I know its not C)
A: 18/6
B: 72/18
C: 6/18
D: 18/72