Which Cisco Application Centric Infrastructure component is responsible for policy instantiation?

Which Cisco Application Centric Infrastructure component is responsible for policy instantiation?

A.
Database tier

B.
Logical model

C.
Leaf

D.
Application network profile

E.
Application tier

F.
Controller

Explanation:
Reference: http://www.cisco.com/c/en/us/solutions/collateral/data-center-virtualization/applicationcentric-infrastructure/white-paper-c11-731860.html (see figure 10)