Read the sentence carefully to identify if there is any grammatical or idiomatic error in one part of the sentence. The error, if present, will be in ...
Question
Read the sentence carefully to identify if there is any grammatical or idiomatic error in one part of the sentence. The error, if present, will be in only one part. Choose the number of that part as your answer. If there is no error, select option (e).
Sentence:
(a) After forty years of trying to / (b) understand why asbestos causes cancer, / (c) researchers have finally / (d) unraveled the mystery. / (e) No error