4. Bobby and Danielle work at the same handmade pottery store. In an hour, Bobby is capable of making 24 cups or 12 vases When he focuses only on cups or vases. Similarly, Danielle can make 30 cups or 12 vases when she focuses on producing only one of the goods. Based on this information, since Danielle's opportunity cost of making a vase is and Bobby's opportunity cost of making a vase is _ then should specialize in making vases for the store. A) 2.5 cups; 2.0 cups; Bobby B) 0.4 cup; 0.5 cup; Danielle C) 0.4 cup; 0.5 cup; Bobby D) 2.5 cups; 2.0 cups; Danielle