When scientists base their knowledge on research evidence, rather than on intuition or faith, they are taking a(n) approach.

Empirical

Explanation:

Empirical research is a method in research based on observation and measurement of the variables involved in the phenomena and derives knowledge not from theory or belief but from actual experience. As the word empirical itself signifies it is the research based on the experience or experiment of the shreds of evidence used in the research.

shang dynasty

western zhou (ca. 1046-771 bce)

eastern zhou (ca. 771-256 bce)

when in doubt choose c

it's what my teacher told my class when we were going into psats