Answer:
B) a writing system used in ancient Egypt
I believe the answer is<span> B. Mountain men were responsible for several discoveries that made travel easier for people moving west.
For example, they were known to be the group of people that first developed the Train Wagons, which allow people to combine the power of large number horses together positioned in a straight line in order to carry a huge amount of people and inventories.</span>
The supply curve would go down while the demand would go up
