Consider the following complex function: $f(z)=\frac{9}{(z-1)(z+2)^{2}}$ Which of the following is one of the residues of the above function?

(A) -1

(B) $9 / 16$

(C) 2

(D) 9

Consider the following complex function: $f(z)=\frac{9}{(z-1)(z+2)^{2}}$ Which of the following is one of the residues of the above function?

(A) -1

(B) $9 / 16$

(C) 2

(D) 9

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