Final answer:
When phishing is combined with VoIP, it is known as d) vishing.
Step-by-step explanation:
The correct answer is D. Vishing. When phishing is combined with VoIP (Voice over Internet Protocol), it is known as vishing. Vishing involves using VoIP to make phone calls and tricking individuals into providing sensitive information, such as personal or financial details, by posing as a legitimate entity.