A circle is represented by the equation below:

(x − 9)2 + (y + 8)2 = 16

Which statement is true?

a) The circle is centered at (−9, 8) and has a radius of 8.

b) The circle is centered at (9, −8) and has a diameter of 8.

c) The circle is centered at (9, −8) and has a radius of 8.

d) The circle is centered at (−9, 8) and has a diameter of 8.