How was Charlotte Lucas' choices limited in Pride and Prejudice Please provide evidence and quotes

Sir William Lucas, desp[ite having a title, was unable to
give his daughters a sufficient dowry to enable them to marry well. The family, with its
numerous children, really could not afford to support unmarried daughters, and the
daughters themselves could not get jobs without losing their status at gentlewomen.
Charlotte, at 27, was considered nearly beyond marriagable age, when she received the
offer from Mr. Collins. Given the economic situation of her family and her
age, accepting the offer was the only possible way she could avoid being an
economic liability to her family -- she had no other economic oppportunities. She
herself sees the practical necessity of the marriage, and unlike the more romantic
Elizabeth, decides to make the best of Mr. Collins.