B.The Oregon Border, because the US claimed all of it from Britain.
Hope this helps :)
I believe the answer is: oil and electricity
Explanation:
He subsequently used his newly invented telescope to discover four of the moons circling Jupiter, to study Saturn, to observe the phases of Venus, and to study sunspots on the Sun. Galileo's observations strengthened his belief in Copernicus' theory that Earth and all other planets revolve around the Sun.
