Answer:
The answer is C.
Step-by-step explanation:
When a person who drinks heavily for a long period of time cuts their alcohol consumption agressively, they experience alcohol withdrawal as it is the case with almost any addiction. The symptoms of alcohol withdrawal include anxiety, sweating, insomnia, vomiting etc. and although all of the options given in the question are necessary precautions that the individual should take, the most important one and therefore the priority is to take enough fluids so that it helps the liver and kidneys to get rid of the toxication in the body. This also makes the process a lot easier.
I hope this answer helps.