Indicate true (T) or false (F), and for each false statement find real number replacements for a, b, and c that will provide a counterexample. For all real numbers a, b, and c:
(A) (a + b) + c = a + (b + c)
(B) (a − b) − c = a − (b − c)
(C) a(bc) = (ab)c
(D) (a ÷ b) ÷ c = a ÷ (b ÷ c)
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