Which of the following north american mountain chains is the oldest? a. appalachian mountains b. sierra nevada mountains c. alaskan mountains d. rocky mountains

they both built pyramids.

with my recent question

answer is b.

  it is always the best policy to have good communication and good relations between individuals and, specially, between leaders of the countries. for this purpose, among others, there is a common place, the united nations, where the representants can present his and learn about the other country's policies.

hi the answer to your question is

to control offices

this sparked alotof controversy more over ending the articles of federation