Final answer:
The second shift refers to the added burdens faced by married women with full-time careers who are expected to fulfill domestic responsibilities. This concept highlights the challenges faced by women in terms of unpaid domestic work.
Step-by-step explanation:
The subject of this question is Social Studies. The phrase 'second shift' refers to the added burdens faced by married women with full-time careers who are still expected to fulfill domestic responsibilities. This concept explores the division of labor between men and women in terms of unpaid domestic work. It highlights the challenges faced by women who work outside of the home while also shouldering the majority of household chores and caregiving responsibilities.