Synonyms for slipped into something

Why would the following likely fail as the basis for an evaluation argument? “the theme of gender bias among adults is an important one.” a. it is based on a moral judgment that not everyone shares. b. it is based on the writers personal tastes. c. it is based on a faulty assumption. d. none of the above.

The author’s purpose for including this in the introduction is

Strategies garrett hardin uses to develop his ideas in lifeboat ethics an how they contribute to his overall point