Respuesta :
Answer:
A). Comfort.
Explanation:
The shift from periodic social drinking(drinking occasionally in balanced quantity which comes under low-risk category and therefore, also acknowledged as 'responsible drinking) to substance abuse(extreme obsession and addiction for alcohol that not only damages an individual but mentally too) evolves due to an individual's need to meet his 'comfort'.
Such evolution arises when a person is going through a tough phase and extremely desires to find comfort in his life that makes him go to every possible extent to meet that comfort even to the extent of 'substance abuse' while looking for that comfort as such individuals possess a constant mental and emotional stress that leads them to such miserable condition. Thus, option A is the correct answer.