The answer is D. you can see the drop in the graph
I believe the answer is:
<span>to reveal past contributions of civilizations
to connect the past to the present
to recognize patterns
By knowing all the things above, future society could learn from the past society and started to make efforts to prevent the bad decision that made in the past from reoccurring. This would help the society to continue developing without facing unnecessary setbacks.</span>
The 1860 presidential election
states’ rights
Philo T. Farnsworth, Vladimir Zworykin, Charles Jenkins and John Baird all attributed greatly to the invention of the modern television each supplying their own piece of the puzzle.
Seventy-five years ago, the television was introduced with skepticism and awe. No one truly believed it would change the way we view the world. Now, people are more attached to their televisions than ever including programming on computers and cell phones; and manufactures, broadcasters and producers are continually finding new ways to bring big entertainment to the small screen.
