Answer:
C. A leader of a conservative interest group
Step-by-step explanation:
In 1970, many campaign was initiated inorder to help in the curtailing or stopping of the ratification of the Equal Right Amendment (ERA). Prominent among the campaign was the one initiated by Phyllis Stewart Schlafly, a leader of a conservative interest group who campaigned vigoriously against the ratification of ERA in the United States Constitution.
She held staunchly conservative social and political views and also, is prominently known to have opposed feminism and abortion.