Task: Inferred Class Relation Reasoning (ontology: Sciences/Biology)

After reasoning, which of the following classes is one valid superclass of 'positive regulation of oxidative stress-induced intrinsic apoptotic signaling pathway'?

A. methanol catabolic process
B. deoxyribonucleotide biosynthetic process
C. aralkylamine N-acetyltransferase activity
D. positive regulation of intracellular signal transduction

Answer: positive regulation of intracellular signal transduction