Which of the following statements is correct regarding the oxygen family (Group $16$)?
$(i)$ The stability of $+6$ oxidation state decreases down the group and the stability of $+4$ oxidation state increases down the group.
$(ii)$ The stability of $+6$ oxidation state increases down the group and the stability of $+4$ oxidation state decreases down the group.
$(iii)$ Bonding in $+4$ and $+6$ oxidation states is primarily covalent.

• A
  Only $(i)$ and $(iii)$
• B
  Only $(ii)$ and $(iii)$
• C
  Only $(i)$ and $(ii)$
• D
  $i, ii, iii$