#### Answer

(A) $0\leq r\leq 3$ and $-\pi \leq \theta\leq 0$.
(B) $0\leq r\leq 3$ and $\pi/4 \leq \theta\leq \pi/2$.
(C) $3\leq r\leq 5$ and $3\pi/4 \leq \theta\leq \pi$.

#### Work Step by Step

We see that the inner radius is $r=3$ and the outer radius is $r=5$. Thus we have:
(A) $0\leq r\leq 3$ and $-\pi \leq \theta\leq 0$.
(B) $0\leq r\leq 3$ and $\pi/4 \leq \theta\leq \pi/2$.
(C) $3\leq r\leq 5$ and $3\pi/4 \leq \theta\leq \pi$.