The sides of a square region, measured to the nearest centimeter, are 6 centimeters long. The least possible value of the actual area of the square region is A.36.00 sq cm B.35.00 sq cm C.33.75 sq cm D.30.25 sq cm E.25.00 sq cm 给的答案是C,可我怎么算都是D,因为边长最小可以是5.5,所以面积是5.5*5.5=30.25,是哪里错了吗?