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How did the love and black elite gain financial security during the antebellum period

Why would the free rider problem prevent a private business from investing in the building of a city sidewalk?

Consider the events in alfred wegener's life that led to his development of the continental drift hypothesis. review the items below and determine whether each item is (1) an observation that led alfred wegener to develop his continental drift hypothesis, or (2) evidence wegener gathered to support his proposal.