Which of the following was the first natural barrier to expansion of the frontier for american colonists?

a. the mississippi river
b. the pacific ocean
c. the appalachian mountains
d. the rocky mountains

The directory was unsuccessful and was eventually replaced because no constitution had been created that outlined its authority. it was connected with the reign of terror. its members did not get along with napoleon. the national convention did not agree with the directory's decisions.

What are some ways in which the british monarchy reacted to colonists continuing to disobey british laws?

The explorer marco polo who visited china was from barcelona luxembourg rome venice