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.