What the reader can conclude about Marcus is: A. Marcus thinks the television has a negative effect on people.
The question is about a letter written by a young Marcus to the Editor of his school's newspaper.
In that letter, he mentioned the huge number of hours spent by people watching television. It amounts to 2 months in a year and 9 years of a person's life. All of these hours will never be gotten back.
So, Marcus thinks that television has a negative effect on people.
Learn more about television addiction here:
https://brainly.com/question/5517151
