The federal government expanded the national parks system due to the financial benefit of setting aside land assets to borrow against.
the need to use federal land for the expansion of the transcontinental rail system.
the activism of environmental groups like the Sierra Club and the National Audubon Society.
the lobbying of urban progressive groups to preserve endangered wildlife on protected land.

2/B - the need to use federal land for the expansion of the transcontinental rail system.

Explanation:

The 1966 Act required that all historical parks be entered in the National Register of Historic Places. Along with the Wild and Scenic Rivers Act, this legislation expanded the diversity of units in the National Park System.

du boi was considered a radical because he wanted the immediate end for segregation. the biggest different between him and booker t. washington is that, even though washington believed that segregation should be considered illegal, he did not believe at all that a law was needed to keep blacks away from whites and that this would be something natural (to have the races apart) for a long time until society adjusted, while du boi believe that agitation was the only way to end segregation.

spanish executed counts egmont and horne in brussels.