One way the American Revolution altered gender roles was the emergence of an ideology that historian Linda Kerber called "republican motherhood". This was the concept that women had an important political role to play in a republican society, but that that role should be limited to within the home.
The correct answer is letter D: Women secured important wins for the Continental army. Although women were not seen as equal, they were still named Daughters of Liberty. By helping the Continental Army in sewing and nursing, women were respected for their role in the Revolutionary War.
Low world prices for primary produce during the depression years from the 1870s to the mid-1890s certainly caused difficulties for Europeans trading to western Africa and led them to think that an increase in European control there would enable them to secure its produce more cheaply.