Which of these would be the best justification of a student inferring that “indigenous” means “originating in a particular region”?

a. the word root “gen” means “earth,” and the suffix “-ous” means “someone who does something".
b. the word root “gen” means “birth,” and the suffix “-ous” means “having the quality of something”.
c. the word root “gen” means “body,” and the suffix “-ous” means “the state or condition of something”.
d. the word root “gen” means “rule,” and the suffix “-ous” means “being filled up with something".