What was the lecture circuit that ralph waldo emerson, henry david thoreau, and frederick douglass spoke at popularly called?

Transcendentalism was the movement that Waldo Emerson, Henry David Thoreau, and Fredrick Douglass spoke on and about. The movement and lectures focused on self-reliance, freedom from constraints on rights, and self-expression. Communities were built around their belief in their philosophy as the guiding force.

Maybe c? sorry if im wrong

Isuck at math i am no sorry