Describe each of the six sectors by inequalities in r and θ. (The scale is the same in all three pictures):

A) 0≤r≤2, 0≤θ≤π/3
B) 0≤r≤2, π/3≤θ≤π/2
C) 2≤r≤3, π/6≤θ≤π/3
D) 2≤r≤3, π/3≤θ≤π/2