Needing help!

Oliver made a pizza that was the same size as the pizza pan he used. The area of the pizza pan was 16(pie sign) square inches. What will be the circumference, in inches, of his pizza?
A. 4 (pie sign) inches
B. 8 (pie sign) inches
C. 16 (pie sign) inches
D. 32 (pie sign) inches

Much Appreciated!

Area = π r^2

π r^2 = 16π
r^2 = 16
r = 4

then circumference = 2πr =2π(4) = 8π