Which of the following generate the type of externality previously described? Check all that apply. A leading electronics manufacturer has discovered a new technology that dramatically improves the picture quality of plasma televisions. Firms of all brands have free access to this technology. Sam has planted several trees in his backyard that increase the beauty of the neighborhood, especially during the fall foliage season. The city where you live has granted a permit to put a movie theater in your neighborhood, causing traffic jams at night and on weekends. Your roommate, Andrew, has bought a bird that keeps you up at night with its chirping.