Answer:
d. both a and c
Step-by-step explanation:
Cephalopods are aquatic organisms that are invertebrates which means that they have no back bone. They are found mainly in marine water. They have tentacles which they use for movement and catching of their prey.
They are called Cephalopods because their tentacles and arms protrude out of their head. They reproduce sexually.
Examples of Cephalopods include Squid, Cuttlefish , Octopus.