Following the American Revolution, some colonists were concerned that Native Americans threatened the western frontier of the United States. What part of the Preamble best addresses this issue? A.
Insure the blessings of liberty
B.
Insure domestic tranquility
C.
Promote the general welfare
D.
Provide for the common defense

If we represent the solar system on a scale that allows us to walk from the sun to pluto in a few minutes, then a) the planets are microscopic and the stars are millions of miles away. b) the planets are the size of basketballs and the nearest stars are a few miles away. c) the planets are marble size or smaller and the nearest stars are thousands of miles away.

In the diagram below, ab and bc are tangent to o. what is the measure of

Can someone me with this plz? ! i'm putting 20 points on it!