The answer is both a and c would be the correct answer
inside the national party.
The most influential members of a party would be at the national level which is basically the top organ of a party. Party officials at the most level, which is the national party are able to influence policy and make the major decisions
The correct answer is C. Chicanos.
"Chicano" was originally a pejorative (negative) term for Mexican Americans, especially the ones with an immigrant backgound.
Within the Mexican Americans there was a need for a new identity, and a feeling (both from within and from outside) that they were different both from the Mexican and from other Americans.
This identity, along with a fight for better fighters' rights, was at the heart of the Chicano Movement, which began in the 1940s. Cesar Chavez was an important activist for this movement.
Nikita Khrushchev and Mikhail Gorbachev. Hope this helps you :D