Answer:
Sandra's parents ingrained in her that although most girls do not continue their education, going to school was important for her to develop a sense of strength and independence.
Step-by-step explanation:
Resilience is a trait that can be defined as the ability to recover after being knocked down by difficulties and come back as strong as before, if not even stronger. As stated in the third option, parents taught Sandra that school was important for her to develop a sense of strength and independence, which are important aspects of resilience.
Sandra's parents rejected traditional gender roles, which means that they wouldn't teach her that she needs to get married and have children or that her brothers are her superiors. They would teach her that they are equals. The fourth option fits this, but there is no reason she would learn to be resilient just because she and her brothers are treated equally in their household.
Thus, the correct option is the third one.