I believe it's D. African Americans had to compete with new immigrants for low-paying factory jobs.
<span>African-Americans helped to strengthen the Republican Party by voting in Republican legislatures. African-Americans in the South were strongly Republican during the era of Reconstruction (which took place right after the Civil War) due to the stance of Lincoln and other Republicans who abolished slavery. Along with this, the Republican party was the political faction that helped to get the 14th amendment passed, which gave African-Americans citizenship.</span>
Answer:
Locks are used to make a river more easily navigable, or to allow a canal to cross land that is not level. Later canals used more and larger locks to allow a more direct route to be taken.
OR
Door locks are used externally to limit entrance into private home and public buildings. The type of locks been used externally includes: Mortise Lock: this is a complete set of locks encased in a square or rectangular shaped metal box to provide the lock with the needed security!!