Which service should you use?

A company has a SharePoint environment that contains two SharePoint servers and a server that
runs Microsoft SQL Server. A web application stores content in a single content database. All three
servers are configured to meet or exceed the minimum hardware and software requirements. The
SharePoint environment is primarily used for team collaboration and document storage.
All of the SharePoint Servers must be able to respond to user requests. Web traffic must be assigned
to the server with the lowest health threshold value.
You need to configure the SharePoint farm.
Which service should you use?

A.
Request Management

B.
Microsoft Network Load Balancer (NLB)

C.
Microsoft SharePoint Foundation Subscription Settings

D.
Document Conversions Load Balancer

E.
Work Management

Explanation:
Configure Request Manager in SharePoint Server 2013
Request Manager is functionality in SharePoint Server 2013 that enables administrators to manage
incoming requests and determine how SharePoint Server 2013 routes these requests.
The front-end web server filtering process follows these steps:
The routing pool is either the current front-end web server or one or more front-end web servers
that request routing selects.
All matching rules are checked to find the smallest health threshold value.
Remove front-end web servers in the routing pool that have health scores greater than or equal to
the smallest health threshold value.
https://technet.microsoft.com/en-us/library/jj712708.aspx