Answer:
C : D
Explanation:
PCT: winning percentage. The number of wins divided by the total number of games (wins plus losses).
A : 10/20 = 1/2 = 0.5
B : 12/20 = 3/5 = 0.6
C : 9/20 = 0.45
D : 15/20 = 3/4 = 0.75
so D has the best (highest) PCT.
and that is answer C.