$\text { A petrol car is parked } 65 \text { feet from a long warehouse (see figure). The revolving }$

Multiple Choice

$\text { A petrol car is parked } 65 \text { feet from a long warehouse (see figure) . The revolving }$ light on top of the car turns at a rate of $\frac { 1 } { 2 }$ revolution per second. The rate at which the light beam moves along the wall is $r = 65 \pi \sec ^ { 2 } \theta \mathrm { ft } / \mathrm { sec }$ . Find the limit of $r$ as $\theta \rightarrow ( \pi / 2 ) ^ { - }$ .

A) $\infty$
B) $65 \pi$
C) 0
D) 65
E) $- \infty$