Which of the following is the equation of a circle that has a radius of 2.5 and its center at (4, -3)?

A. (X-4)²+ (Y+3)²=2.5
B. (X+4)² + (Y-3)² =2.5
C. (X-4)² + (Y+3)² =6.5
D. ( X+4)² + (Y-3)²=6.5