What is the difference between p-waves and s-waves?

P waves travel in the earth and go forward and backward. S waves are on the surface and go side to side.

The S waves go side to side, and can cause damage, and the p waves don't cause damage.

It is the doctrine that the us had the right and duty to expand throughout north america. it just means they believed they had the right to expand westward and they did! they stated with the 13 colonies and then they kept moving gaining different territories throughout the years

The correct answer should be brand c.