What was the purpose of the berlin conference

What major land feature is located at 0* and 20* e? a sahara desert b kalahara desert c congo basin d the alps

Based on the information given and the gauges which process or processes have their alarm light on?

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.