Which equation represents the general form a circle with a center at negative 2 comma negative 3 and a diameter of 8 units?

A circle with center (−2, −3) and radius 4 (half its 8-unit diameter) has equation (x + 2)² + (y + 3)² = 16. Expanding and collecting terms gives x² + y² + 4x + 6y − 3 = 0, which is choice D.

AI-written and checked against the verified answer.