As of 1973, the U. S. had a population of 210 million
people, who were increasing by 0.8 percent per year.
Outside our lifeboat, let us imagine another 210 million
people (say the combined populations of Colombia,
Ecuador, Venezuela, Morocco, Pakistan, Thailand and the
Philippines) who are increasing at a rate of 3.3 percent per
year. Put differently, the doubling time for this aggregate
population is 21 years, compared to 87 years for the U. S.
Why does the author present these statistics?
O A. He is appealing to the audience's sense of humor.
O B. He is appealing to the audience's sense of logic.
O C. He is trying to establish his importance as a trusted writer.
O D. He is appealing to the audience's emotions.

Read this excerpt from "edward jenner and the history of smallpox and vaccination.” smallpox was introduced to europe sometime between the fifth and seventh centuries and was frequently epidemic during the middle ages. the disease greatly affected the development of western civilization. the first stages of the decline of the roman empire (ad 108) coincided with a large-scale epidemic: the plague of antonine, which accounted for the deaths of almost 7 million people. the arab expansion, the crusades, and the discovery of the west indies all contributed to the spread of the disease. unknown in the new world, smallpox was introduced by the spanish and portuguese conquistadors. the disease decimated the local population and was instrumental in the fall of the empires of the aztecs and the incas. similarly, on the eastern coast of north america, the disease was introduced by the early settlers and led to a decline in the native population. before it reached the new world, smallpox played a role in