Emma downloaded a new game from an unfamiliar website. A few days later, Emma realized her system had been hacked and her credit card numbers were stolen. Without Emma knowing, what type of malware might she have downloaded to her computer?

Trojan horse

Explanation:

When Emma downloaded a new game from an unfamiliar website. Trojan horse is automatically installed on Emma computer. Trojan horse is a very powerful malware that can harm the system it makes the system in the idle state. The Trojan horse makes the computer system in the slow state, even it has the capability to hack the overall system that's why the credit card of Emma has been stolen.