Clara is asked to find the surface area of a sphere which has radius r, of 18 in. She says the surface area is 226.08 in. squared. What is the surface area of the sphere? What is Clara's likely error? Use 3.14 for pi.
The surface area of the sphere is about

(Type an integer or decimal rounded to the nearest hundredth as needed.)
What is Clara's likely error?
A.
Clara did not multiply by 3.14.
B.
Clara did not multiply by four when solving.
C.
Clara did not square the radius when solving.