Read these passages from When Birds Get Flu and Cows Go Mad! by John DiConsiglio. "Spanish Flu Mystery May Be Solved!" Dr. Julie Gerberding, director of the CDC, told the British Broadcasting Company (BBC), "By unmasking the 1918 virus, we are revealing some of the secrets that will help us prepare for the next pandemic." "Fear of Food?" Don’t worry about mad cow disease. But pay attention to E. coli. We want you to enjoy your food. Really, we do. But there could be some nasty bacteria lurking in that burger. Or in that salad. . . . Here’s how you can protect yourself from it. What is the most likely reason why the author includes these passages?
A) to connect the various sections with humor
B) to add some positive notes to the serious overall tone
C) to emphasize the difficulty in dealing with these viruses
D) to cause the reader to be concerned about diseases

Spanish flu was speared worldwide in 1918. By adding the paragraph the author wants to add a positive note to the entire text.

What caused the Spanish flu?

Based on the 1918 virus' data assembled in 1997, it was claimed that the 1918 virus was a novel influenza A (H1N1) virus a subgroup of viruses whose source of origin were humans and pigs and not birds.

The author includes these passages to add some positive tone to the overall serious tone in the passage.

Therefore, option B describes the motive of the author to add the paragraph.

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