Final answer:
The employee at the branch office would use an intranet to access confidential internal pricing information. An intranet is a secure network designed specifically for internal use within an organization.
Step-by-step explanation:
An employee who needs to access internal confidential pricing information from a branch office would typically use an intranet. An intranet is a secure network used within a company that allows employees to access internal resources. It is different from the Internet, which is a public network. An extranet could be used if external partners such as customers or suppliers needed access to certain parts of the company's internal network. However, for internal employee access, the intranet is the appropriate network. A local area network (LAN) is more suited for smaller, localized networking requirements within a single office or building, and while the employee might use a LAN to connect to their workstation, accessing head office servers would generally involve the intranet.