How did marco polo change the relationship between europe and china?

What are the 6 steps in the scientific method

Which of the following is not one of the five informal ways to amend the constitution? oa) state legislation ob) presidential actions oc) supreme court decisions od) political party activities

Plz ! after the first battle of bull run general ivan mc dowell was removed from command of the union army he was replaced by a. general ulysses s. grant. b. general george mcclellan. c. general robert e lee. d. general george meade.