More frequent holidays for workers in Europe than in the United States contribute to:

a.) fewer hours worked per year by the average employed person in Europe than the average employed person in the United States.

b.) lower employment-to-population ratios in Europe than in the United States.

c.)higher employment-to-population ratios in Europe than in the United States.

d.)more hours worked per year by the average employed person in Europe than the average employed person in the United States.