In the sentence, what does come to light mean?
Through the reporter’s efforts, many unknown facts have come to light.
Note
been revealed is correct because come to light means to become known, discovered, or revealed.
This idiom or phrase is useful because it helps students understand the intended meaning beyond the individual words.
Examples: New evidence came to light during the investigation. The truth came to light after the witness spoke.
The idiom uses the idea of light figuratively; it means hidden information became known.