Even a single occasion of excessive drinking can .

a. weaken the immune system for at least 24 hours
b. cause the development of severe cirrhosis
c. result in a diagnosis of drug abuse
d. lead to a fatal heart attack

on a single occasion or over time – can take a serious toll on your health.  Here’s how alcohol can affect your body:

Drinking too much can weaken your immune system, making your body a much easier target for disease.  Chronic drinkers are more liable to contract diseases like pneumonia and tuberculosis than people who do not drink too much.  Drinking a lot on a single occasion slows your body’s ability to ward off infections – even up to 24 hours after getting drunk.

Brain:

Alcohol interferes with the brain’s communication pathways, and can affect the way the brain looks and works. These disruptions can change mood and behavior, and make it harder to think clearly and move with coordination.  

Heart:

Drinking a lot over a long time or too much on a single occasion can damage the heart, causing problems including:

Cardiomyopathy – Stretching and drooping of heart muscle

Arrhythmias – Irregular heart beat

Stroke

High blood pressure  

Liver:

Heavy drinking takes a toll on the liver, and can lead to a variety of problems and liver inflammations including:

Steatosis, or fatty liver

Alcoholic hepatitis

Fibrosis

Severe Cirrhosis

 A.  Weaken the immune system for at least 24 hours.

Explanation:  I just got this wrong on the test.