________ important human behavior is ________.

A) All; learned
B) Most; inborn
C) Most; learned
D) All; inborn

While some human behavior may be innate or genetically influenced, the majority of human behavior is learned through socialization and experience. Therefore, the most accurate choice is C, which indicates that "most" human behavior is learned. The other choices, A and D, make absolute statements that are not entirely true.