Some of the following sentences are gramatically incorrect and some are correct. Find out which part of a sentence has an error and mark the part . if there is no error mark the part of your answer.
`(" We will ")/a` learn `("a lot by attending")/b ("the english")/c` course.`("isn't it")/d ("No error")/e.`

Explanation

(d) say .won.t we.