Question

16. Many of the ancient remains show that there ........ life here for a long time. A-must have B-might be C-could have been D-couldn't been​

Answer 1

Option C) could have been

Many of the ancient remains show that there could have been life here for a long time.

Step-by-step explanation:

We are talking about the possibility of something happening in past and therefore 'could have been' is our answer.