How did Timbuktu become a center of learning

When children heard an interesting story about a sympathetic and resourceful african-american child, the aim was to provide them with?

Which action best represents the policy of appeasement followed by britain and france prior to the start of world war ii? (a)allowing hitler to annex the sudetenland as part of the munich agreement (b)signing the nazi-soviet pact binding hitler and stalin to peaceful relations (c)sending troops to fight with the liberals during the spanish civil war (d)forbidding the sale of arms to any nation at war

This refers to weather and atmospheric conditions measured over a long period of time.