You are sitting in a room with a door on your lef a wall of windows on your right, a desk in front
you, and a bookcase behind you. This statement
uses reference points to describe your
A speed
B
velocity
C position
D
motion

answer: blah

explanation:

bc blah

the statements that apply here about binary star system are

"have stars that might appear to wobble"

"often have one star that is brighter than other"

a binary star is a star system consisting of two stars revolving around their common barycenter. systems of two or more stars are called multiple star systems.