How are the Republican and Democratic presidential candidates chosen?

Which quantities decrease as the distance between a planet and the sun increases? check all that apply.

Brainliestttme : ) how did the soviet union try to maintain control?

Why was the united states motivated to establish the open door policy? a. the policy guaranteed american commerce with china. b. the policy supported the chinese nationalist cause. c. the policy led to a gain of american colonies in asia. d. the policy claimed damages from the chinese.