Answer:
He became fixated at the B. an al stage of psychosexual development.
Step-by-step explanation:
The an al stage is the second stage of the psychosexual development. It is characterized by learning about control, mainly through the child's control of those around him/her and his/her sphincters.
When an individual has a fixation in this stage, it relates to accumulation and being extremely uptight, especially with neat and order. This is because the individual has the subconscious fear of losing control and "getting dirty" thus exercising extreme control and behaving in a compulsive way.
This is also known as OCD or Obsessive-Compulsive Disorder.