The correct answer is:
C. Standard controller and the recordSetVar page attribute

The standard controller provides built-in functionality for managing the selected object type, while the recordSetVar attribute enables handling multiple records in a list view or related list.

Example:
<apex:page standardController="Account" recordSetVar="accounts">
<apex:form>
<apex:pageBlock title="Edit Multiple Accounts">
<apex:pageBlockTable value="{!accounts}" var="acc">
<apex:column headerValue="Account Name">
<apex:inputField value="{!acc.Name}" />
</apex:column>
</apex:pageBlockTable>
<apex:commandButton value="Save" action="{!save}" />
</apex:pageBlock>
</apex:form>
</apex:page>

Answer B - Not correct:
If using a custom list controller, the recordSetVar attribute is not applicable, as recordSetVar works with standard controllers.

Answer is C
https://developer.salesforce.com/docs/atlas.en-us.pages.meta/pages/pages_controller_sosc_associate.htm

The right answer is A.
We have Standard List Controller and Custom List Controller. Option C is missing the word 'List'.