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Step-by-step explanation:
A. 4 x 3/5 = 4/4 x 3/5 = 12/20
B. 4x4 x 1/5 = 12/5
C. 12 + 1/5 = 4 x 3 x 1/5 = 12/5
D. 4 x 5/3 = 4 x 5 x 1/3 = 20/3