Use Polar Coordinates to Describe the Region as Shown in the Figure

Multiple Choice

Use polar coordinates to describe the region as shown in the figure below:

A) $R = \{ ( r , \theta ) : - 4 \leq r \leq 4,0 \leq \theta \leq \pi \}$
B) $R = \{ ( r , \theta ) : 0 \leq r \leq 8,0 \leq \theta \leq \pi \}$
C) $R = \{ ( r , \theta ) : 0 \leq r \leq 5,0 \leq \theta \leq \pi \}$
D) $R = \{ ( r , \theta ) : 0 \leq r \leq 2,0 \leq \theta \leq \pi \}$
E) $R = \{ ( r , \theta ) : - 6 \leq r \leq 6,0 \leq \theta \leq \pi \}$