I believe your answer is D my friend.. good luck! :)
The answer is 0 anything multiple by 0 =0
You can re-arrange your sentence in this way:
In order to identify the development of tornadoes, few required conditions can be described.
Answer:
We look at political documents, records, and historical agreements; they offer hints about life in the past.
We look at political documents, records, and historical agreements because they offer hints about life in the past.
We look at political documents, records, and historical agreements. They offer hints about life in the past.
Explanation:
