What quality refers to social media's ability to digitally save messages and make them accessible to other people?

A _____ method of research would be used to answer the question, "how many?"

Answer:

Television had a significant and direct impact on movies in theaters - causing in large part the introduction of widescreen movies such as CinemaScope - during the: 

A. 1920s B. 1950s C. 1970s D. 1990s