Which equations illustrate the commutative property of multiplication?

Choose exactly two answers that are correct.

A.
• 3.4 = 3.4 •

B.
–8 • (5 + 3.1) = (5 + 3.1) • (–8)

C.
–4 • (5 + 7.1) = –4 • 5 + (–4) • 7.1

D.
–8 • (4 • 1) = (–8 • 4) • 1