Ouabain is a drug that acts by inhibiting the Na⁺/K⁺ pump. Once ouabain binds to the pump, the pump can no longer pump ions. Which of the following statements most accurately describes the initial effect of ouabain on intracellular Na+ concentration?
A) Intracellular Na⁺ concentration increases
B) Intracellular Na+ concentration stays the same
C) Intracellular Na⁺ concentration decreases