Answer:
b. Commutative property of multiplication
Step-by-step explanation:
The operation 5 • 7 • 4 = 5 • 4 • 7 is demonstrating the commutative property of multiplication, because factor 7 and 4 are being commutate, that is, changed their position, to prove that no matter the order, it will result the same quantity. Also, it's property of multiplication and not addition, because there are factor that are being multiplied.
The next of the demonstration should be:
5 • 7 • 4 = 5 • 4 • 7
140 = 140.
Therefore, option B is the right answer.
