They need to read more of the authors writings to find the key to the story's truths.
Answer:
Wearing a mask is a good practice of hygiene because it limits the spread of bacteria and/or airborne illnesses from one person to another.
Explanation:
It is a barrier that prevents mouth to mouth contact so that bacteria or virus expelled orally is not inhaled or spread in the form of spit.
Sorry, but You need to specify what book/story
Based on my prior knowledge of the word I would say C (unoriginal) is a pretty safe choice.
The answer is D, today Russia wants to train all astronauts