1. People are right-handed or left-handed because of
a. the population
b. the way the brain works
c. Paul McCartney and Julia Roberts
d. the messages the brain receives
2. The brain
a. has two halves
b. has two left halves
c. is heavier in intelligent people
d. is lighter in intelligent people
3. Each side of the brain
a. likes language and math
b. controls the same things
c. controls different things
d. changes all the time