What is the purpose of the dig command?

A.
To adjust a directory’s hidden permissions

B.
To search for files on the filesystem

C.
To adjust a file’s hidden permissions

D.
To perform hostname lookups

E.
To ping all known hosts on the current subnet

Explanation/Reference:
From the man pages:
dig (domain information groper) is a flexible tool for interrogating DNS name servers. It performs DNS lookups and displays the answers that are returned from the name server(s) that were queried. Most DNS administrators use dig to troubleshoot DNS problems because of its flexibility, ease of use and clarity of output.