Lucia is a company director. She is interested in the proportion of employees who eat eggs in the morning. She randomly selects 30 employees and finds that 22 of them eat eggs in the morning. Which of the following is the population being studied?
a. The 22 employees who eat eggs in the morning.
b. All employees within USA.
c. The true proportion of employees that eat egg in the morning in company.
d. All employees in Lucia's company.