The correct answer to this question would be alternative C)"Secular people and places."
Humanism is a philosophical and ethical belief that emphasizes the value of human beings, both individually and collectively. It also prefers critical thinking and evidence over dogma and superstition.
It affects art as it steps away from religion, and puts men in the center of the scope. For this reason, secular (non-religious) places and people would best show the effects of Humanism in Art.