$A$ metal,$M$,forms chlorides in its $+2$ and $+4$ oxidation states. Which of the following statements about these chlorides is correct?

• A
  $MCl_2$ is more ionic than $MCl_4$
• B
  $MCl_2$ is more easily hydrolysed than $MCl_4$
• C
  $MCl_2$ is more volatile than $MCl_4$
• D
  $MCl_2$ is more soluble in anhydrous ethanol than $MCl_4$