Key signs of an alcohol overdose include

Alcohol poisoning is a result of overdosing from ingested alcoholic drinks. It is considered as an emergency and needs immediate medical attention when the following symptoms are seen in an individual: confusion, vomiting, seizures, slow breathing (about less than 8 completed breaths per minute), irregular breathing (there are 10 second gaps in between breaths), blue or pale skin, and excessively low body temperature.The worst symptom of alcohol poisoning is when a person passes out and cannot be awakened. This requires immediate help of professionals and should not be taken lightly. 

Iwould say a is correct

The answer would be d. most contraceptives are effective when used properly