Why Is the Magnitude of Na⁺ Electrochemical Gradient Created by the Na⁺/K⁺

Why is the magnitude of Na⁺ electrochemical gradient created by the Na⁺/K⁺ pump larger than the magnitude of K⁺ electrochemical gradient?

A) because K⁺ chemical and electrical gradients occur in the same direction whereas Na⁺ electrical and chemical gradients occur in opposite directions
B) because Na⁺ chemical and electrical gradients occur in the same direction whereas K+ electrical and chemical gradients occur in opposite directions
C) because Na⁺ is a bigger ion than potassium
D) because Na⁺ gradient is directed toward the inside of the cell