A, because that is an act of congress that allows them to make sure the president can't enforce laws he only wants to.
China had invaded Vietnam
<span> President Lincoln rescinded Fremont's emancipation proclamation, fearing it might push other Border States (slave states loyal to the Union) into the Confederate camp. Staff corruption, opposition from Missouri’s influential Blair family, and military defeats caused Lincoln to relieve Fremont of his command on November 2, 1861.</span>
Answer:
Muhammad, the founder of Islam, was born in Mecca.
What is expected is that they will eventually visit Mecca.
I don't want to speak more on this as I am not a Muslim myself however hopefully this helps.
B they had finish part of it in 1869 and it had taken them six years so that means they started building it in 1863. Then they had continued after that but it was small sections of them adding to the existing railroad.