<u>Answer:</u>
<u>Social engineering</u> is the method, the hacker use to hack Ryan’s account.
<u>Explanation:</u>
<em>The act of obtaining information by pretending them to be right person and start stealing information to gain money.</em>
Sniffing: It is a technique of attacking a data packets which are passed through the network. It is one way of stealing information.
DoS: This option is no way related to network or hacking.
Spoofing: This is a very close answer, but spoofing normally hacks a computer by placing a malicious file.
<em>So According to the given situation of obtaining password and username from the user by wearing a false ways relate to the term Social engineering.</em>