Where are web tier nodes located in the reference topology?

A.
outside the Exalogic rack

B.
in the public zone part of the DMZ

C.
in the secure zone part of the DMZ

D.
in the shared zone part of the DMZ

Explanation:
http://docs.oracle.com/cd/E18476_01/doc.220/e18479/ref_topo.htm#CEGIFGHF (web
tier )