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

Which of the following classes is one valid superclass of 'L-tryptophan catabolic process to acetyl-CoA'?

A. acetyl-CoA metabolic process
B. 2-amino-4-hydroxy-6-hydroxymethyldihydropteridine diphosphokinase activity
C. 1-acylglycerophosphocholine O-acyltransferase activity
D. 1,4-alpha-glucan branching enzyme activity

Answer: acetyl-CoA metabolic process