A −5.0nC charge is carried sequentially from point A to point B to point C. The electric potentials at the three points are VA=30V, VB=−10V, and VC=60V, respectively. What is the net change in the charge’s electric potential energy after the entire trip from A → B → C?
a) −3.5×10−7J
b) +1.5×10−7J
c) −1.5×10−7J
d) +5.5×10−7J