IMO, this is not a good question.
Both D and E are close. I do agree that E sounds more natural but D is not bad. With D we could narrow the scope of the finding that early hominids might use fire from 1m years ago to 500.000 years ago. Not bad at all.
Both D and E are close. I do agree that E sounds more natural but D is not bad. With D we could narrow the scope of the finding that early hominids might use fire from 1m years ago to 500.000 years ago. Not bad at all.
