Answer: A bar graph comparing the players who wear titanium necklaces and player who wears fake titanium necklaces.
Explanation:
The benefit of anything can be seen when there is a comparison between before using the thing and after using the thing.
The same formula is used here where the baseball players has started wearing a braided titanium necklaces which helps in improving the strength of players.
If there needs to be a comparison between the effectiveness of the necklace then there should be a graph drawn between the people wearing authentic necklace and people wearing fake necklace.