Answer: a)Recursive
Explanation: Recursive DNS( Domain Name System) is the server that support the DNS servers in authority.They help in the management of the load that gets produced by the requests from the user. The load is managed by splitting/distributing so that the website requests becomes supportive and load can be relieved.
Other options are incorrect because they don't revert with the query message for the DNS servers processing .Thus, the correct option is option(a).
The compression ratio is 20:1 please mark me brainliest
