Answer:
The correct answer is: A) Those that are cephalized.
Step-by-step explanation:
The Central Nervous System is only present in animals that are cephalized, capable of moving, and have bilateral symmetry.
Cephalized animals have a proper region in their front end in which the mouth, the sensory organs and the nerve ganglia concentrate and form a "head".
An animal with bilateral symmetry has a single plane of symmetry (the sagittal plane) which divides the body into two halves: one left and one right.
Animals that are radially symmetrical exhibit a pattern around their central axis that repeats itself up to 8 times. A good example of a radially symmetrical animal is a starfish.