Area of a sector is the angle divided by two and multiplied by the square of the radius: A = 3*pi/4*16^2/2 = 3*pi*2*16 = 96 *pi units^2

C because the central angle is 135 degrees so if we use the formula m/360 * pi * radius squared, and in this case m= 135 and r = 4, it equals 96.