Women were asked to work in factories during World War I because
most women could be paid less than men.
most men refused to do factory work.
most men were away fighting in the war.
O most women did not want to stay at home.

it would be d). more resources must be obtained to attain that combination of goods and services

this is a pretty broad question and can be a pretty lengthy answer. since 1900, women have gained a lot more rights and have become active in the workforce. with women being in the workforce, men play a larger role in family life. many family tasks are shared between men and women, whereas, women used to be the sole family caretakers.

that should get you started at least.