7212. He has implicated them in the conspiracy.

✅ The correct answer is option B.
Interested : showing curiosity or concern about something or someone; having a feeling of interest.

Involved : cause to participate in an activity or situation.

Affected : influenced or touched by an external factor.

Influenced : have an influence on.

Implicated : show (someone) to be involved in a crime.

Synonym of Implicated is Involved