C) x
D)+
Explanation
The assoaciative property states that when three or more are added (or multiplied), the sum (or the ) is the same regardless of the grouping of the multiplicands
[tex]\begin{gathered} a\cdot(b\cdot c)=(a\cdot b)\cdot c \\ a+(b+c)=(a+b)+c=(a+c)+b \end{gathered}[/tex]Associative property can only be used with addition and multiplication and not with subtraction or division
so, the answer is
C) x
D)+
