Why are people 16 to 18 years old discouraged from working full-time?
A. they cannot walk travel long distances
B. they have less experience
C. they are not strong enough
D. schoolwork should be their priority

What happens when two galaxies approach each other? a. they form a black hole. b. they merge because of the strong gravitational pull they exert on each other. c. they shred each other into smaller galaxies. d. they form a supernova. e. they repel each other away because of their strong gravitational pull.