I believe the answer here is C change their languages, religion, and customs. since the Spanish we're heavily religious and would do anything to convert more people to they're religion
The right answer is C: Participating in an interest group. An interest, lobby or advocacy group consists of an organized group of people that, seeking a common public interest, get together and work jointly in order to advocate for and pursue that interest before the authorities.
He shall have Power, by and with the Advice and Consent of the Senate, to make Treaties, provided two thirds of the Senators present concur; and he shall nominate, and by and with the Advice and Consent of the Senate, shall appoint Ambassadors, other public Ministers and Consuls, Judges of the Supreme Court.
This is what I ended up with.