The game is fun to play, it's implied because the family seems to be enjoying itself, and it's the only answer choice that isn't outright stated in the commercial.
Answer:
To explain Thoreau's view that we have a responsibility to act
The correct answer is ( A )
This article is about an invention called ReWalk uses robotic pants with sensors and motors to allow people in wheelchairs to walk. The other statements (B), (C) and (D) are secondary ideas which expand the main concept or thesis statement.
