Evaluate the expression for the given values.
(a) m = 9(b) m = -3(c) m = -9
A. (a) 
(b) undefined
(c) - 
B. (a) 
(b) undefined
(c) - 
C. (a) 
(b) 0
(c) 
D. (a) 
(b) undefined
(c) 
Answer: D
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