$\begin {array} {1 1} (A)\;Today \: is \: Sunday \: and \: Matt \: can \: play \: hockey \\ (B)\;If\: Matt \: plays \: hockey,\: then\: today \: is \: not\: Sunday. \\ (C)\;Today \: is\: Sunday\: and\: Matt\: cannot\: play \: hockey. \\ (D)\;Today\: is \: not\: Sunday\: if\: and\: only\: if\: Matt\: plays\: hockey. \end {array}$