Answer:
C. It reveals that chimpanzees need some prompting to act selflessly.
Explanation:
The above statement helps in proving the understanding which was gotten about the chimpanzees. Though the chimpanzees renders selfless services most of the time, it could not be possible if there was never an external factor which will push them to act such. <em>For example, when in danger and crying, this would trigger the chimpanzee to assist towards helping the person.</em>
An inference is someone's belief or opinion based only on the information that he/she knows.
"Squatter sovereignty" was a term used by the people that disagreed with the political doctrine which stated that the owners of federal territories should decide if their lands would enter the Union as slave or free states.
The inference being made in the excerpt is the belief that slavery should be allowed inside the territories of people who chose to enslave others, without the interference of anybody else.
