can u tell me which letter the answer is.. i know how to do this problem im just confused what the answer is

In similar triangles, corresponding sides have the same ratio.
Check for every option:
A.
56/45 = 1.24
50/39 = 1.28
B.
56/35 = 1.6
32/20.5 = 1.56
C.
56/36 = 1.56
32/18= 2
D.
32/24= 1.3333
56/42=1.33333
50/37.5= 1.33333
Correct answer . D.