Option: D. Her childhood and professional experiences with low-income farm workers convinced her that advocacy was necessary.
Explanation:
Dolores Huerta is famously known as a labour leader in America. She became an elementary school teacher and saw the poverty of her students, who were children of farmworkers, she got involved in advocacy for agricultural workers and their families. She tried to improve social and economic conditions for workers and to fight discrimination. In 1962 Huerta and with Cesar Chavez co-founded the farmworkers union that would later call as the United Farm Workers.
Arab nations of the Organization of Petroleum Exporting Countries (OPEC) imposed an embargo against the United States and its allies as a response to the U.S. decision to provide military support to the Israeli in order to give the Israel a jump start in the post-war peace negotiations.