Final answer:
theHarvester is the best tool for gathering information such as emails, subdomains, and employee names in an automated way.
Step-by-step explanation:
The tool best suited to Selah's needs is theHarvester. theHarvester is a popular open-source data gathering tool specifically designed for information gathering about a target company. It can extract emails, subdomains, employee names, and other information from various sources such as search engines, social networks, and public databases. Unlike other options listed, theHarvester is specifically built for gathering this type of information.