Find the Length of the Curve $r = 6 \text { over the interval } 0 \leq \theta \leq 2 \pi \text {. }$

Multiple Choice

Find the length of the curve $r = 6 \text { over the interval } 0 \leq \theta \leq 2 \pi \text {. }$

A) $2 \pi$
B) $\pi$
C) $36 \pi$
D) $12 \pi$
E) $6 \pi$