In Which of the Following Aqueous Solutions Does the Weak

In which of the following aqueous solutions does the weak acid exhibit the lowest percentage ionization?

A) 0.01 M HC₂H₃O₂ (K_a = 1.8 × 10^-5)
B) 0.01 M HNO₂ (K_a = 4.5 × 10^-4)
C) 0.01 M HF (K_a = 6.8 × 10^-4)
D) 0.01 M HClO (K_a = 3.0 × 10^-8)
E) These will all exhibit the same percentage ionization.