An example of a strong acid solution is perchloric acid, ${\text{HCl}}{{\text{O}}_{\text{4}}}$, in water. Which statement is correct for this solution?

A.     ${\text{HCl}}{{\text{O}}_{\text{4}}}$ is completely dissociated in the solution.

B.     ${\text{HCl}}{{\text{O}}_{\text{4}}}$ exists mainly as molecules in the solution.

C.     The solution reacts only with strong bases.

D.     The solution has a pH value greater than 7.

A