The Equilibrium Constant for the Acid Ionization of Mercaptoethanol (HSCH₂CH₂OH $\times$

The equilibrium constant for the acid ionization of mercaptoethanol (HSCH₂CH₂OH ) is 1.91 $\times$ 10^-10_. HSCH₂CH₂OH(aq) H^-(aq) + SCH₂CH₂OH^-(aq)
Which of the following is true regarding this equilibrium?
I.The reaction is product-favored.
II.The reaction is reactant-favored.
III.Equilibrium lies far to the right.
IV.Equilibrium lies far to the left.

A) I and III
B) I and IV
C) II and III
D) II and IV
E) None are true, as the concentrations of reactants and products are comparable.