Parts of the given sentence have been given as options. One of them may contain an error. Select the part that contains the error from the given options. If you don’t find any error, mark ‘No error’ as your answer.
I have watched a lot of students excel in online courses, taking fully advantage of the convenience.

A

excel in online courses, taking fully

B

advantage of the convenience

C

I have watched a lot of students

D

No error