Cambios de el deporte en los años 20

What strategy is this ad using to get people to support its product? o o lt claims that everyone agrees that these basketballs are the best it details how these basketballs will improve performance. it provides stats about players who use these basketballs. it uses a celebrity to endorse these basketballs.

The internal combustion engine was an innovation of

What new concept did the the american revolution introduce into the world