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

After reasoning, which of the following classes is one valid superclass of 'negative regulation of oligodendrocyte apoptotic process'?

A. basophil mast progenitor cell
B. head mesenchyme from mesoderm
C. negative regulation of lymphocyte proliferation
D. negative regulation of programmed cell death

Answer: negative regulation of programmed cell death