The Average Distance of the Electron from the Proton in the Hydrogen

The average distance of the electron from the proton in the hydrogen atom is 0.5 × 10−¹⁰ m.What is the electric field from the proton's charge at the location of the electron? (k_e = 8.99 × 10⁹ N⋅m²/C²,e = 1.6 × 10−¹⁹ C)
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A) 5.8 × 10¹¹ N/C
B) 9.2 × 10⁶ N/C
C) 1.2 × 10² N/C
D) 2.9 × 10−⁸ N/C
E) ​1.0 × 10−⁸ N/C