Select all that apply. 1. (1 pt) Look at each pair of statements. Each statement in the pair is labeled as a cause or as an effect. Mark the pair of statements if they are correctly labeled. A. Cause: Europe's population decreased. Effect: The Black Death attacked Europe. B. Cause: There were fewer workers. Effect: Peasants left their manors. C. Cause: The manor system crumbled. Effect: Peasant farmers prospered. D. Cause: Citict: Skilled craftsmen and others moved away from manors.