Answer: B. How the flu infects the body.
Explanation: This is the right answer for those who have different multiple choice answers like me. - A P E X
The information that is involved explicitly in the national geographic video:
B). How the flu virus mutates.
The message that is clearly and precisely communicated through the video is the way mutations take place in the virus that causes flu.
This helps the readers realize how quickly the mutations take place and as a result, may impact the health of the people differently.
Thus, they need to understand this and take precautions accordingly to deal with it to avoid serious consequences.
Therefore, the correct answer is option B.
Learn more about "Geography" here:
brainly.com/question/1462956