The (blank) led to the demise of new nuclear power plants planned for washington.
1. accident at three mile island
2. construction of the grand coulee dam
3. creation of the wppss
4. cleanup of the hanford project site

the completion of the erie canal spurred the first great westward movement of american settlers, gave access to the rich land and resources west of the appalachians and made new york the preeminent commercial city in the united states.

b. sec, foreign relations