Clark, a professional hacker, was hired by an organization lo gather sensitive Information about its competitors surreptitiously. Clark gathers the server IP address of the target organization using…

AOL (America Online) is an internet service provider and web portal, not a tool for looking up IP address registration details.

ARIN (American Registry for Internet Numbers) is one of the five Regional Internet Registries (RIRs) responsible for managing IP address allocation and registration in North America. Its public databases, such as Whois, allow users to look up an IP address and retrieve detailed information about the associated network range, owning organization, and contact details, which can be used to infer network topology and potentially OS information indirectly.

DuckDuckGo is a privacy-focused search engine, not a registry for IP address information.

Baidu is a Chinese multinational technology company specializing in internet-related services and products, primarily a search engine, not an IP address registration lookup tool.