12) Which statement describes why genetie variation can be beneficial to a population? a to decrease the number of disease resistant individuals
b. to ensure that all offspring survive during times of environmental change
c. to increase the chance that some offspring survive during times of environmental change
d. to ensure phenotypic diversity with potential mates for offspring with different physical appearances

Which of the following is true? a. under the current unemployment insurance system, benefits replace about 90 percent of the typical worker's prior pretax earnings. b. high benefit payments to unemployed workers will tend to increase the rate of unemployment. c. if a system of personal savings accounts replaced the current unemployment benefit system, the unemployment rate would fall to zero. d. the rate of unemployment in the large european economies has been persistently lower than that of the united states due to their more generous unemployment benefits.