Which of the Following Formulas Illustrates the Associative Property of Multiplication

Multiple Choice

Which of the following formulas illustrates the associative property of multiplication?

A) $( a \cdot b ) \cdot c = a \cdot ( b \cdot c )$
B) $a ( b + c ) = a b + b c$
C) $a + b = b + a$
D) None of these