a. compression 
b. evaporation 
c. humidity 
d. reduced air pressure
a. men, 180 pounds; 
women 159 pounds 
b. men, 190 pounds; 
women 159 pounds 
c. men, 200 pounds; 
women 179 pounds 
d. men, 210 pounds; 
women 179 pounds 
a. Winston Churchill's son. 
b. a famous musician. 
c. a popular actor. 
d. his favorite author. 
 
