If the head of cockroach is removed,it may live for few days because:

Options

A. the supra-oesophageal ganglia of the cockroach are situated in ventral part of abdomen.
B. the cockroach does not have nervous system
C. the head holds a small proprtion of a nervous system while the rest is situated along the ventral part of its body
D. the head holds a 1/3rd of a nervous sytem while the rest is situated along the dorsal part of its body.