Final answer:
Option (B), Populism in the American context emphasizes the importance of the common person in shaping government policy, reflecting the democratic principle of power derived from the people.
Step-by-step explanation:
Populism, within the context of the American political system, highlights a belief that power should be vested in the average person rather than concentrated among a select group of political insiders or a wealthy elite. Based on the provided definitions and the history of American democracy, the value populism most closely aligns with choice B: The common person is important in determining government policies.
This philosophy is embedded in the nation's democratic principles and its commitment to representative democracy, where citizens actively participate in governance and policy making. Additionally, populist values resonate with the founding ideas of republicanism in America where governance is believed to be derived from the people, ensuring that their voices are represented through elections and civic engagement.