<span>A large portion of Siberia is covered in permafrost, which basically means that the ground is frozen all year around. As a result it would be difficult to dig for resources in Siberia. Additionally Siberia is quite cold making the working conditions there very harsh.</span>
The answer you are looking for is option B I hope this helps you.
The U.S constitution was fully signed on July 4th, 1776, the day America lawfully became a country.