Sociologist Arlie Hochschild writes that employed parents put in a of unpaid family work that leaves them stressed and drained.

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.

answer; use multiple stimuli;

answer; gender,race,age,/// (d) all of these;

answer; soren kieregaard was a 19th century danish philosopher;