In a survey of 12,086 men in a particular country, 46.8% received an influenza vaccine for a recent flu season. Identify the population and sample:
a) Population: 46.8%, Sample: 12,086 men
b) Population: 12,086 men, Sample: 46.8%
c) Population: Men who received an influenza vaccine, Sample: 12,086
d) Population: All men in the particular country, Sample: Survey