Although my department always submits its annual report by the end of the year, some <i>________</i> wait until the end of January.<br/><br/> (A) <br/>had has to<br/><br/> (B) <br/>has had to<br/><br/> (C) <br/>have had to<br/><br/> (D) <br/>had to have<br/><br/>I think its C. Please confirm.