The difference between HCl and $HC_2H_3O_2$ as acids is

Question

$\begin{array}{1 1} \text{(a) the first has less hydrogen in solution} \\ \text{(b) the second has more ionized hydrogen} \\ \text{ (c) the first is highly ionized} \\ \text{ (d) the second is highly ionized } \end{array}$