You are given a geometric mathematical question. Questions in this task often involve shapes and Geometric Relationships. You are also given 4 or 5 answer options (associated with "A", "B", "C", "D", "E"). Do not generate anything else apart from one of the following characters: 'A', 'B, 'C', 'D', 'E'. LaTeX mathematical format (the standard way to express mathematical expressions in the typesetting software known as LaTeX) is used to express equations. Each question is solvable with high school math knowledge.

[EX Q]: \begin{gather} x^2 + y^2 + 4x - 2y = -1 \end{gather} The equation of a circle in the xy-plane is shown above. What is the radius of the circle?
(A)2 (B)3 (C)4 (D)9
[EX A]: A

[EX Q]: Lines m and n are parallel. If lines m and n are cut by three different transversals, what is the least number of points of intersection that can occur among the five lines?
(A)3 (B)4 (C)5 (D)6 (E)8
[EX A]: B

[EX Q]: Which of the following has the same area as a circle with an area of \(16\pi\)?
(A)A circle with a radius of \(4\pi\) (B)A circle with a circumference of \(32\pi\) (C)A circle with a radius of 8 (D)A circle with a diameter of 4 (E)A circle with a circumference of \(8\pi\)
[EX A]:
E