Answer:
B is what I feel is most correct , might be wrong though...
I'm pretty sure the answer is C
If you are referring to the people Christopher Columbus found in America and incorrectly named them Indians (because he thought he had arrived in India), then the correct answer is Native Americans.
The word pair that would be best to complete the analogy: emblem:insignia is the guard:sentinel. An analogy is a similarity of both things. The words guard and sentinel share the same meaning just like the analogy; emblem:insignia. The answer is the analogy guard:sentinel.