Task: Class Relation Understanding (ontology: Sciences/Biology)

Which of the following classes is one valid superclass of 'L-tryptophan catabolic process to indole-3-acetate'?

A. ABC-type taurine transporter transporter activity
B. ABC-type xenobiotic transporter activity
C. 2-amino-4-hydroxy-6-hydroxymethyldihydropteridine diphosphokinase activity
D. L-tryptophan catabolic process

Answer: L-tryptophan catabolic process