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.
`("After ")/a` every participant `("had")/b` three minutes `("to express")/c("their opinion")/d` the debate was thrown open to the audience .`("No error")/e`.

Explanation

(d) Say .his.