The best description of the role of women during the early 1900s from the options provided is:
Unmarried women in the lower class worked in service jobs.
During this time, many unmarried women, particularly from lower socioeconomic backgrounds, often took jobs as domestic workers, in factories, or in other service roles to support themselves and their families. Married women typically had different societal expectations and were less likely to work outside the home, especially in upper and middle-class families.