To solve this question, the user needs to have a basic understanding of computer networking.

Option A is incorrect because Wi-Fi is not a type of computer. A computer is a machine that can store, retrieve, and process data.

Option B is incorrect because Wi-Fi is not a type of network cable. Network cables are physical cables that connect devices to a network.

Option C is correct. Wi-Fi is a set of popular technologies and standards for wireless computer networking. It allows devices to connect to a network without using physical cables.

Option D is incorrect because Wi-Fi is not a set of computer programs that help people make money on the Internet. Wi-Fi is a technology used for wireless networking.

Therefore, the answer is: C. set of popular technologies and standards for wireless computer networking.