D - establishing post offices would be a implied power of Congress
For Martin Luther King Jr., it was a dream. Over the course of a decade, King became synonymous with nonviolent direct action as he worked to overturn systemic segregation and racism across the southern United States. The civil rights movement formed the guidebook for a new era of protest
The answer is A. Drove production costs up. It drove production costs down, because they were able to take less time to make the products as well as less materials because 1) standardized parts were invented around the same time, and 2) they didn't have people preparing everything so materials weren't wasted.
