A person who illegally accesses or enters another person's or a company's computer system to obtain information or to steal money is known as a Hacker. Correct answer is C. Hacker.
Since 1. A person who uses computers to access data without authorization.
2. A person or thing that is roughly hacking or cutting.
Hacking refers to activities aimed at compromising digital devices, such as computers, smartphones, tablets, and even whole networks.
And while hacking may not always be for malicious purposes, nowadays most hacking references and hackers characterize it / them as cybercriminals ' unlawful activity — motivated by financial gain, protest, gathering (spying) information, and even just for the "fun" of the challenge.