Do these three sentences carry the same meaning? If not, which one is correct? And what are the differences?<br/><br/>Thank you for your help.<br/><br/>(A) <br/><br/>The purchase of a third photocopier has improved efficiency by greatly reducing time wasted waiting in line.<br/><br/>(B) <br/><br/>The purchase of a third photocopier has improved efficiency greatly by reducing time wasted waiting in line.<br/><br/>(C) <br/><br/>The purchase of a third photocopier has greatly improved efficiency by reducing time wasted waiting in line.