It depends on which words are bolded.
If the words in bold are <em>to work, </em>then this is an C. infinitive.
Answer:
When water evaporates, it leaves any impurities behind. As a result, the Dead Sea has the saltiest and most mineral-laden natural water in the world. The surface water has a salinity of about five to nine times that found in the oceans, and the salinity increases with depth.
Explanation:
Yes it is true because "revision" means <span>reread work done previously to improve one's knowledge of a subject, typically to prepare for an examination.</span>
False I belive hope this helps