Part A Which sentence best states the central idea of paragraphs 21-22 in "Energy Story"?

A. Materials that are insulators and conductors have a high
resistance to electricity.

B. It is more difficult for electricity to pass through insulators than conductors.

C. Insulators and conductors are able to generate a high amount of electricity

D. Electrons move through rubber easier than they move through
metal.

Part B

Which sentence from "Energy Story" best supports the answer in Part A?
A. "Electricity is conducted through some things better than
others."
B. "Its resistance measures how well something conducts
electricity."
C."Some things hold their electrons very tightly."
D. "Other materials have some loosely held electrons, which move
through them very easily."