Read the sentence carefully to identify if there is any grammatical or idiomatic mistake in it. The error, if present, will be in one part of the sent...
Question
Read the sentence carefully to identify if there is any grammatical or idiomatic mistake in it. The error, if present, will be in one part of the sentence. Choose the letter corresponding to that part as your answer. If the sentence is correct as it stands, select 'No error'. (Ignore punctuation errors.)
Sentence:
By the time the scientists (A) / announced their findings, (B) / they have conducted multiple rounds (C) / of experiments to validate their results. (D)