In 1937, two Harvard psychologists asked the public for assistance in helping find the Lindbergh baby after he was kidnapped. People were asked to submit the contents of their dreams. Out of 1300 submissions, approximately percent accurately predicted that the baby had already died.

i would say b. research typically uses a variety of sources

swahili is an extremely rich and complex civilization, a set of ethnic groups articulated by a language and a series of cultural elements that fuse the african traditions, islam and indian culture. this growth was largely a result of the indian ocean trading network that brought in not just man-made riches, but also religious ideas, specifically islam, which had a significant impact on the local culture. furthermore, the development of the swahili language gave a common cultural unity to the people.