Who from Among the Following Is Counted as Employed

Who from among the following is counted as employed?

A) Ray wants to work forty hours per week, but can only find work for twenty hours per week.
B) Anna Marie spends all of her time taking care of her children at home.
C) Frank would like to work, but has not looked for work because he believes no jobs are available.
D) Martin has been offered several jobs in the past four weeks, but has chosen not to accept any of the offers.