Which of the following contributions did Harriet Martineau make to sociology? Select all that apply.

Harriet Martineau is often considered one of the first female sociologists, and she made several important contributions to the field. One of her key contributions was her emphasis on the importance of studying society through a scientific lens, which helped lay the groundwork for sociology as a discipline. She also wrote extensively about social issues, such as gender equality and the rights of different social groups, making her a pioneer in advocating for social justice. For example, in her book "Society in America," she analyzed American society and highlighted the struggles faced by women and the poor, showing how social structures affect people's lives. Through her work, Martineau helped to broaden the scope of sociology to include a focus on both individuals and society as a whole.