The Squid Served as an Ideal Model System to Study

The squid served as an ideal model system to study neurophysiology because

A) squids are invertebrates and invertebrates have a simpler nervous system than vertebrates.
B) the large diameter of the squid's neurons enabled researchers to make recordings from inside of a nerve cell.
C) fast electrical communication is a unique feature of squids.
D) squids are active predators and therefore have many nerves that can be easily studied.