Two Protons,each of Charge 1

Multiple Choice

Two protons,each of charge 1.60 × 10−¹⁹ C,are 3.00 × 10−⁵ m apart.What is the change in potential energy if they are brought 1.00 × 10−⁵ m closer together? (k_e = 8.99 × 10⁹ N·m²/C²)

A) 3.84 × 10−²⁴ J
B) 3.20 × 10−¹⁶ J
C) 1.15 × 10−²³ J
D) 3.20 × 10−¹⁹ J