Domain name extensions are the . . . . . . . . part of a domain name. A. first B. middle C. last D. front

The correct answer is C. last.

A domain name extension is the last part of a domain name, after the dot. It is used to identify the type of organization or website. For example, the domain name extension “.com” is used for

The other options are incorrect. The first part of a domain name is the name of the organization or website. The middle part of a domain name is the top-level domain (TLD), which is the two-letter code that identifies the type of organization or website. The front part of a domain name is the root domain, which is the part of the domain name that is before the dot.