I'd say b, but I feel this could be somewhat open to interpretation.
Of food is the adjective phrase.
Answer: The correct answer is D.
Explanation:
The main idea of the passage is to describe how those fossilized remains were found, the location of the discovery and the people who was responsible for this achievement. You can also see that it's not focusing on the archeologists but on other details about the expedition and discovery, so the correct answer has to be D.
No only presidents get to be in it for 4 years then there is another political debate