It’s the one that has (page20) at the end
Radiation exposure can lead to skin cancer and other various types of cancers
To show you've done research on the subject, and it can also make it so if you copy and pasted it can show you didn't commit plagiarism.
Example: Why citing is important
It's important to cite sources you used in your research for several reasons: To show your reader you've done proper research by listing sources you used to get your information. To be a responsible scholar by giving credit to other researchers and acknowledging their ideas.Nov 13, 2019
Overview - Citing sources - LibGuides at MIT Libraries
https://libguides.mit.edu › citing
Hope this helps, if not, comment below please
Months don't have 80 days (only four months of 30 days make eighty days).
Months have 30 or 31 days. February is the only month with 28 days, except for leap years in which February has 29 days.
January, March, May, July, August, October and December have 31 days. Whereas April, June, September and November have 30 days.
I believe the answer is C) the author provides a personal example and a reference to a movie to support his idea