for head of household filing status, which of the following costs are considered in determining whether the taxpayer has contributed more than one-half the cost of maintaining the household?
a. food consumed in the home: yes, value of services erndered in the home by the taxpayer: yes
b. food consumed in the home: no, value of services erndered in the home by the taxpayer: no
c. food consumed in the home: yes, value of services erndered in the home by the taxpayer: yes
d. food consumed in the home: no, value of services erndered in the home by the taxpayer: no