D,it never acceptable to ignore rules or etiquette but A, when no one else notices you ignored the rules.
An item that should not be included is procrastination.
Answer:
cognitive neuroscience
Explanation:
Based on the information provided within the question it can be said that the developmental approach that is being mentioned is cognitive neuroscience. This is a scientific field that concerns itself with minds aspects of underlying cognition, but more importantly on the neural connections that exist in mental processes. Part of this field is also working with genes associated with mental health disorders such as autism and schizophrenia
The least likely explanation for this would be that they're training at different intervals, or one is training harder than the other.
The most likely reason is that the way the other person's genetics are most people cant gain muscle as well as others because of disease or their body structure.
Hope this helped!
