The Ku Klux Klan is a terrorist organization that was created and supported after the American Civil War by former Confederate soldiers with the aim of pursuing and murdering blacks.
The founding of the Ku Klux Klan happened between 1865 and 1866 in Pulaski, a small town in the interior of Tennessee. The founders of the Klan were six former members of the Confederate Army, troops who fought for southern states seeking separation during the American Civil War.
Answer:Brand dilution.
Explanation:
Brand dilution is the mechanism through which a certain brand is weakened because of its overuse.Brands becomes less meaningful due to using products or items that are not good fit for brand .They lose effectiveness and wort due to unsuccessful brand extension.
According to the question,brand dilution is the issue of the scenario as fruit flavored beverage is an unsuccessful brand extension of the same brand whose dried fruit snack is liked by Marco.This is making him doubtful about the snack also because of ineffective product.Thus,brand lost its power.
Circumference formula is

. Since it decreases by 2 inches,

and r=1.146 and the diameter is

.
I would guess it's a learning disability.