Verified Answer :

(-7/8)(-3/4) = 21/32  Choice C.

Steps in multiplying fractions:
Step 1 Multiply numerators   ⇒ -7 -3 = 21  (negative signs are cancelled)
Step 2 Multiply denominators ⇒ 8
4 = 32
Step 3 Simplify fraction ⇒ 21/32 already in simplified form.

(-7-3) / (84) = 21/32

(-7/8)(-3/4)
= + (73)/(84)
= 21/32

The final answer is c. 21/32~