The correct answer is C. Extranet.
An extranet is a private network that uses Internet technologies to share information with suppliers, partners, or customers. It is a subset of an intranet that is extended to users outside the organization. Extranets are often used to share information about products, services, or to collaborate on projects.
An intranet is a private network that is used by an organization’s employees. It is typically used to share information, such as documents, email, and applications. Intranets are often used to provide employees with access to resources that are not available to the public, such as human resources information or financial data.
A website is a collection of web pages that are accessed over the Internet. Websites can be used to provide information, sell products, or provide services. Websites are typically hosted on servers that are owned by the organization that created the website.
An ISP is an Internet service provider. ISPs provide access to the Internet to individuals and businesses. ISPs typically offer a variety of services, such as dial-up, DSL, and cable Internet.
In conclusion, an extranet is a computer network that is used to controlled access from outside of an organization’s intranet.