Which of the following can be considered a possession factor type in Okta?

A possession factor type in Okta refers to something that an individual physically possesses, which can be used to verify their identity. Google Authenticator qualifies as a possession factor because it generates time-based one-time passwords (TOTPs) that users must access through a device that they own—typically a smartphone or hardware token—making it a clear example of a "something you have" factor.

In contrast, a security question relies on knowledge and is therefore not a possession factor but rather something the user knows. Similarly, a phone can be considered a possession factor in a broader sense when it is involved in receiving SMS codes or making phone calls to approve login attempts. However, without further context indicating that the phone is being used in a manner consistent with possession (like receiving codes through text), it does not fit as cleanly as Google Authenticator. Therefore, while Google Authenticator distinctly represents a possession factor, other choices do not fit as neatly into that categorization. Thus, the correct choice here focuses specifically on the concrete possession aspect of Google Authenticator.