The answer is C, Thomas Edison
(A) The office is led by the chief of staff, who serves as a key adviser to the president.
Ellis island is the answer ,angel island was on the west coast
Slavery was incredibly divisive because the Us was expanding into the west, and each new state had to decide whether it was going to be "slave" or "free", so there was no middle ground in terms of how the extension of slavery would unfold. This led to the Civil War.
