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

Which of the following classes is one valid superclass of 'human metabolite'?

A. mammalian metabolite
B. 3rd arch endoderm
C. 1st arch mandibular component
D. ({[(2R,3S,4R,5R)-3,4-dihydroxy-5-(9H-purin-9-yl)oxolan-2-yl]methyl phosphonato}oxy)(phosphonatooxy)phosphinate

Answer: mammalian metabolite