<em>Which best explains how the fourteenth and fifteenth amendments expanded citizenship in the united states?</em>
B). by redefining citizenship and removing voting limitations
The fourteenth amendment granted that everyone born in the united states is automatically a citizen, and grants them equal protection of the laws.
The fifteenth amendment states that no one should be denied voting based on their skin color, gender, race, etc.
Although C is a possibility, the fifteenth amendment doesn't establish protection exactly.