Question

@HaloX156 @Kevin @Will.H

Answer 1

It's D

Answer 2

Area of a circle is either
Area=\(\pi r^2\) where r=radius, or
Area = \(\pi d^2/4\) where d=diameter.
Which formula to use depends on which or radius or diameter you are given.
If you wish, you could also do a conversion using
d=2r.

Answer 3

Thanks MathMate!
P.S. Did HaloX156 get it correct?