Final answer:
Approximately 50% of victims of intimate violence report that alcohol was involved in the violent incident.
Step-by-step explanation:
The correct answer is d) 50%.
According to the information provided, nearly half of instances of intimate partner violence (IPV) involve drugs or alcohol. It is stated that approximately 42 percent of IPV incidents involve alcohol or drug use. Therefore, it can be inferred that alcohol is involved in 50% of violent incidents.