How does the law of conservation of energy apply to machines?

(a) machines create energy from scratch.
(b) machines consume energy until no energy remains.
(c) energy transferred to a machine equals energy transferred from it.
(d) engineers break the law of conservation of energy by using machines.

C. Energy transferred to a machine equals energy transferred from it.

Explanation:

prism b but im not for sure

the national environmental policy act (nepa) is a united states environmental law that promotes the enhancement of the environment and established the president's council on environmental quality (ceq). the law was enacted on january 1, 1970. to date, more than 100 nations around the world have enacted national environmental policies modeled after nepa.