The Bohr Model Pictures a Hydrogen Atom in Its Ground

The Bohr model pictures a hydrogen atom in its ground state as a proton and an electron separated by the distance a0 = 0.529 × 10⁻¹⁰ m. The electric potential created by the electron at the position of the proton is

A) −13.6 V.
B) +13.6 V.
C) −27.2 V.
D) +27.2 V.
E) +5.12 × 109 V.