Answer
Catabolism ultimately produces ATP. As the ultimate end product, ATP could inhibit the pathway once it reached a sufficiently high concentration.
Work Step by Step
The concept of feedback inhibition is that a needed end product acts as an inhibitor once enough of it has been made. ATP would have to act as an inhibitor in this case. The other key is to see that ATP is one (and often the primary) goal of catabolism breakdown.
