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