单选题 Let P and Q be points which are two inches apart, and let A be the area, in square inches, of a circle which passes through P and Q. Which of the following is the set of all possible values for A?

(A) 0＜A
(B) 0＜A ≤π
(C) A=π
(D) A＞π
(E) A ≥π

【正确答案】 E

【答案解析】If PQ is a diameter of the circle, then the radius is 1 and A, the area, is π. This is the smallest possible value of A, but A can be any number larger than π if the radius is made sufficiently large, as shown by the figures below.
[*]
The answer is A ≥ π.