What is the conditional distribution of income level among single men?
a) Low income: 20.5%, Middle income: 40.2%, High income: 39.3%
b) Low income: 25.0%, Middle income: 35.8%, High income: 39.2%
c) Low income: 18.7%, Middle income: 42.1%, High income: 39.2%
d) Low income: 22.3%, Middle income: 38.5%, High income: 39.2%
