For what values of \[a\] and \[b\] does the expression, \[[12+(-\,5)]+a=b+[(-\,5)+(-\,8)]\] show the associative property of integers under addition?

For what values of \[a\] and \[b\] does the expression, \[[12+(-\,5)]+

1.	For what values of \[a\] and \[b\] does the expression, \[[12+(-\,5)]+a=b+[(-\,5)+(-\,8)]\] show the associative property of integers under addition?
A.	\[8\text{ }and\text{ 1}2\]
B.	\[-\,8\text{ }and\text{ 1}2~\]
C.	\[12\text{ }and\text{ }8\]
D.	\[-12\text{ }and\text{ }8~\]
Answer» C. \[12\text{ }and\text{ }8\]

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For what values of \[a\] and \[b\] does the expression, \[[12+(-\,5)]+a=b+[(-\,5)+(-\,8)]\] show the associative property of integers under addition?

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