Select the Correct Graph of the Polar Equation $$\theta$$ For Which the Graph Is Traced Only Once

Multiple Choice

Select the correct graph of the polar equation.Find an interval for $$\theta$$ for which the graph is traced only once.​ $$r = \cos \left( \frac { 3 \theta } { 2 } \right)$$ ​

A) ​ $$0 \leq \theta < 4 \pi$$
B) ​ $$0 \leq \theta < 4 \pi$$
C) ​ $$0 \leq \theta < 4 \pi$$
D) ​ $$0 \leq \theta < 4 \pi$$
E) ​ $$0 \leq \theta < 4 \pi$$