The answer is B) Difficulties that resulted from not having separate presidential and vice presidential election in the electoral college in the election of 1800. Before this change, they basically just chose the runner up president as a VP.
C would be the correct answer
B - Advocated in favor of slavery.
Copper sheathing<span> is a practice of protecting a under-water hull of a ship or boat from the corrosive effects of salt water and bio fouling through the use of </span>copper<span> plates affixed to the outside of the hull.
It was pioneered and developed by the Royal Navy during the 18th century.
Hope this helps.</span>