Answer:
D. promoted civil rights
Step-by-step explanation:
Washington Gladden was a firm advocate of social justice. He advocated and promoted civil rights. Also, he promoted workers' right, voting rights and also for the needs of the poor and oppressed. He was very concerned about the well -being of workers. He supported them and also pioneered the unionization of employees.
He was the Ministee of the First Congregational Church of Columbus, Ohio.