Answer:
C. Marriage was the only means for women to gain social mobility.
Step-by-step explanation:
Jane Austen's time is the 1600s where women had very limited professional development. In such a very patriarchal society, women were inferior and their only chance at improving their status in life was marrying a man of certain stature; although marriages were still arranged then. They had no voice of their own and they were not even allowed to vote.