It's called Nullification
Overcrowding was most directly contributed to the spread of disease in city tenements in the early 1900.
Back then , the city was shocked by smallpox epidemic. Since smallpox is easily transmitted by contact, overcrowded areas are the perfect breeding spot for smallpox ( they still has not developed small pox vaccine back then)
Television B is correct answer.
Television is a major new media technology that became the most popular by following World War ll.
Hope it helped you.
-Charlie
