Which of the Following Is True About the Federal Relations

Which of the following is true about the federal relations law?

A) The Executive Order 10988 prevented unions representing a majority of federal employees within a unit from negotiating exclusive written agreements with an agency but only covered noneconomic and nonstaffing issues.
B) The federal government opposed union activities among its employees until the 1880s,when postal employees began to organize.
C) Before the Lloyd-La Follette Act of 1912,federal employees were forbidden to lobby Congress about their employment.
D) Union activities decreased in the 1930s,and President Roosevelt asserted that collective bargaining was not possible in the federal sector.