The argument based on faulty reasoning is:
A The new “Brush Right” electric toothbrush is easier for kids to hold.
While the claim that the toothbrush is easier for kids to hold is presented, the reasoning may be faulty because it does not provide sufficient evidence or comparison to demonstrate how "easier to hold" translates into better user experience or improved brushing habits compared to other toothbrushes. The assertion is subjective without specific data or feedback from children regarding their experience with holding the toothbrush.