What is the diameter of a circle whose area is 16π?

Explanation

To find the diameter, first calculate the radius by using the formula for the area of a circle: Area of circle = πr^2. Given that the area is 16π, we get r = 4. The diameter is then found by multiplying the radius by 2, resulting in a diameter of 8. Option A is incorrect as it refers to the radius, Option C is incorrect as it provides a value double the diameter, and Option D is incorrect as it includes unnecessary π in the answer.