Taylor is writing a progress report on development of a new software program for a client. She and her team faced a technical glitch last week which however, has been solved now. Which of the following is the best way to present this information to the client?

A$.$"After correcting the huge problem we had last week, we should be back on track by due date if we face no other glitches."B$.$"Please accept our sincere apologies. We will be unable to complete the work according to the estimated deadline."C$."$We overcame a major technical glitch last week. We are now on track and expect to finish the work by the due date."D$."$I$\text{'}$m really sorry, but we're running $2$ days behind schedule. We will however be back on schedule by the end of the month."E$."$We have had a major problem last week because of which our work is affected to an extent. However, we should be able to finish by the due date."