It is TRUE that the shift from periodic social drinking to substance abuse evolves to meet a person's need for "comfort and esteem."
According to various research findings, the people that move from periodic social drinking to substance abuse usually do such due to the need to give themselves comfort when they are suffering from one sad moment or depression.
The other way people change from periodic drinking to substance abuse is to elevate their self-esteem, especially when they are low on confidence.
It should be B because after a crime scene is found and the police have already marked everything, the detectives (head of the investigation) are the ones who come in and take control of everything.
