The writer wishes to add the following sentence in order to show that jet lag can sometimes

Question:

The writer wishes to add the following sentence in order to show that jet lag can sometimes be a more serious problem:
There are those, however, who routinely fly across continents either for pleasure or business, and jet lag can become a more serious issue for these people.
The new sentence would best support and be placed at the end of Paragraph:
A. 1
B. 2
C. 3
D. 4

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