A set of buttons that are styled like standard Salesforce buttons. This component must be a child component of an <apex:pageBlock>. Note that it is not necessary for the buttons themselves to be direct children of the <apex:pageBlockButtons> componentbuttons that are located at any level within an <apex:pageBlockButtons> component are styled appropriately. 

Answer options:

A. apex:includeScript
B. apex:commandButton
C. apex:pageBlockButtons
D. apex:form

C