A capacitor is made from large circular plates with a radius of 3 meters and a distance of 6 mm. VC - VB = -7.3 × 10³ volts. What is the capacitance?

a) 2.12 × 10⁻¹¹ F
b) 1.06 × 10⁻¹¹ F
c) 4.24 × 10⁻¹¹ F
d) 5.30 × 10⁻¹¹ F