Final answer:
Alexis de Tocqueville regarded Egalitarianism as an essentially American value, reflected in the American Dream and the ideathat all individuals have equal opportunities for success.
Step-by-step explanation:
The value Alexis de Tocqueville saw as essentially American is D. Egalitarianism. Tocqueville, a French political thinker and historian, visited the United States in the 1830s and was impressed by the American belief in equality and the concept of equal opportunity, a fundamental aspect of what is known as the American Dream. He noted how democracy in the U.S. pushed the idea of equality before the law, and how Americans valued hard work and talent as determinants of social mobility, rather than inherited wealth or prejudicial treatment.