Review the sentence.

The 1918 influenza (flu) is called a pandemic because it [blank].

Which best completes the sentence?

A. was the first time the flu spread between world regions
B. infected upwards of 500 million globally
C. began in the 19th century and carried into the 20th century
D. was confined to two continents



Answer :

Final answer:

The 1918 influenza pandemic, known as the Spanish flu, resulted in a significant global impact with millions of deaths due to the widespread infection.


Explanation:

The 1918 influenza pandemic, also known as the Spanish flu, infected about 500 million people globally and resulted in the deaths of between fifty and a hundred million people. This pandemic is considered so severe because it spread worldwide, affecting nearly the entire globe, and caused exceptionally high death tolls.


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