Sisters Maria and Jennifer Salvador start their days before the sun. The Southern California teenagers report to work at an Oxnard strawberry farm with one goal: To harvest as many bright red strawberries as they can. Each 20-pound box of stemless strawberries they collect brings in $3. In the evenings when school was still in session, albeit remotely – and after chores at home were done — Maria and Jennifer turned to their school work. The two relied primarily on their father’s cell phone bec...