Which equation applies the associative property of multiplication?

a: 1/2 ⋅ (5/8 + 3/6) = (1/2 ⋅ 5/8) + (1/2 ⋅ 3/6)

b: −12/5 ⋅ (7/12 ⋅ 1/9) ⋅ 8/5 = (−12/5⋅7/12) ⋅ (1/9⋅8/5)

c: (−4/11 − 2/3) − 3/4 = −4/11 − (2/3 − 3/4)

d: 4/9 ⋅ (−3/8) ⋅ 9/4 = 4/9 ⋅ 9/4 ⋅ (−3/8)