During the First Half of the 20th Century, a Change

During the first half of the 20th century, a change in the structure of society resulted in changed roles for women and, in turn, for nursing. What was one of these changes?

A) More women retired from the workforce to raise families.
B) Women became more dependent and sought higher education.
C) The focus of nursing changed to "hands-on training."
D) Nursing research was conducted and published.