The editors of scientific american are able to obtain a representative sample of their readers in order to assess their attitudes toward preservation of the rainforests in costa rica. when interpreting the results of their survey, the editors will be able to

it continues in business

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.