Correct option is D
The word " consensus" means a general agreement among a group of people, while " agreement" means a situation in which people have the same opinion or come to a common understanding. Therefore, "agreement" is the correct synonym of "consensus" in the given context.
Synonyms: Agreement, harmony, unity, concord.
Antonyms: Disagreement, discord, dissent, conflict.
Meanings of other 3 options are as follows:
Decisive - settling an issue or producing a definite result; having the ability to make decisions quickly and effectively.
Acceptance - the action of consenting to receive or undertake something offered.
Mutually - experienced by or done to each other; held in common by two or more parties.