Which describes the molecular behavior of a solid? i think it's a, but im not sure

a. molecules vibrate around a fixed point.
b. molecules are too far apart to affect each other.
c. molecules have the greatest energy of motion.
d. molecules are rigid and do not move.

Select the correct answer. why are scientific models important in the study of science? a. they always involve critical mathematical calculations. b. they scientists understand complex ideas and objects that aren’t easy to handle. c. they enable scientists to popularize their work in society. d. they are required when conducting any peer review process. e. they are necessary for turning a hypothesis into a law.