Which of the following statements best explains the relationship between cities and the development of trade? a. cities were crucial to the development of guilds and trade associations. b. cities became centers for collecting regional products and importing foreign products. c. cities encouraged civic participation through open locations for assembly. d. cities became centers of education and sports as job specialization encouraged more leisure time.

Extensive and unusual cold snaps have occurred here recently. is this evidence that global warming is lessening or not occurring? no—although the long-term trend is for warming, short-term weather patterns can still be variable. no—melting of glaciers and ice caps is making the oceans cooler, which can cause cold snaps. yes-- if global warming really were occurring, cold snaps wouldn’t happen. yes—due to global warming, weather patterns should be become less—not more—variable.