If You Were Advising a Friend on the Benefits or Harms

If you were advising a friend on the benefits or harms of allowing her young children to watch television, you would be most correct if you informed her that the most important factor in this question is

A) ​the content of the programs that children watch.
B) ​the number of hours that children watch television.
C) ​the number of programs that children watch television.
D) ​whether children watch television while doing other things, such as eating meals.