How does Mariam show that she has grown into a woman of strong character before her death?

Mariam's childless marriage to Rasheed eventually forces her into a life of submission and misery until close to the end of her life, when Laila provides her with some hope. At the end of the novel, Mariam rises up in revenge and strikes Rasheed dead. She ultimately is tried and executed by the Taliban for her actions. The Taliban could kill her but they could not take away her newly found pride in herself and her gender.