A is the correct answer since pandemic means spread worldwide, or to a whole country.
You could seek the help of a tutor to understand more about the class, and learn new things.
An example of a simile is the following:
"The tree was as thin as a hound dog."
As in the sentence above, a simile is a figure of speech which compares two different things, in order to make the description more intense or forceful. Another example could be:
"The man is as tall as a giraffe."
It helps you figure out what you want to investigate and how.
