19. how did the transcontinental railroad impact travel?

Which of these reasons describes why spain was motivated to compete with portugal

Plz ive been stuck on this question forever. in 1753 george washington was sent on a mission to a. build a fort at the point where the allegheny and monongahela rivers form the ohio river. b. attack the french at fort duquesne. c. attack the french at fort neccessity. d. deliver a message to the french demanding that they leave the ohio river.

Why did the free african americans fight for the patriot cause and explain why enslaved africans volunteered to fight for both sides