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

Which of the following classes is one valid superclass of 'intrinsic apoptotic signaling pathway in response to osmotic stress'?

A. cellular response to osmotic stress
B. (N-acetylneuraminyl)-galactosylglucosylceramide N-acetylgalactosaminyltransferase activity
C. 3-(3-hydroxy)phenylpropionate catabolic process
D. 3'-5'-RNA exonuclease activity

Answer: cellular response to osmotic stress