Select the correct ootuib:
The discovery, _______ was unexpected, altered the trajectory of the entire study.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. which.
Grammatical concept: This sentence uses a non-defining relative clause. When we add additional information about a non-human subject (the discovery) that is separated by commas, we use the relative pronoun 'which'.
Correct word/ phrase: which
Final sentence: The discovery, which was unexpected, altered the trajectory of the entire study.
Hence, the chosen option is correct.