Answer:
B. Dominant traits
Explanation:
Dominant traits are as what the name implies, dominant over other traits. If something overpowers the other trait then it is a dominant trait.
They have two pairs of main nerve cords organized around a number of paired ganglia. while they don't have a "true brain"-- they have somewhat of a nervous system, composed of the two, or three pairs of nerve cords contained in the visceral mass.
