A circle with its center at the origin (0,0) passes through the point (3,4). What is the circumference of this circle?

✓ Correct Answer: Option B

The radius is the distance from (0,0) to (3,4), which is √(3^2 + 4^2) = √(9+16) = √25 = 5. The circumference is 2πr = 2π(5) = 10π.