Answer:
D. 80 - 120 billion.
Step-by-step explanation:
The brain is the control center of any animal. It controls every part of the animal's body function. According to Professor Lara Rangel, the range of neuron count in the adult brain is between 80 to 120 billion. In her article, she said that neurons can be lost as a result of sickness and other factors, which makes the number of neurons vary in the adult brain.