The climate was once colder. The shells were carried by the wind. The mountain was covered by water. The shells once lived on dry land.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: A scientist found fossils of ocean shells on a mountain top. Based on this find, which statement can be made?
Possibilities:
- The climate was once colder.
- The shells were carried by the wind.
- The mountain was covered by water.
- The shells once lived on dry land.

The mountain was covered by water.