He is the member of the club.
a. contentest
b. most content

B. most content

Explanation:

The adjective content refers to somebody who is in a peaceful happiness circumstance. Besides, because content is a long adjective, the superlative form does not add the suffix -est: the superlative is actually formed placing the definite article the plus most before the adjective.

actually the answer would be c.) jane addams worked hard to improve the lives of less fortunate people.