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

Which of the following classes is one valid superclass of 'regulation of cerebral blood circulation'?

A. regulation of blood circulation
B. ADP-ribosyl cyclase/cyclic ADP-ribose hydrolase 1
C. 1st arch maxillary mesenchyme from head mesenchyme
D. ATP biosynthetic process

Answer: regulation of blood circulation