If your custom frontend theme is missing an expected template file, the last place Magento will look is thisdirectory: ______________.

A.
app/design/frontend/base/default

B.
skin/design/frontend/base/default

C.
skin/frontend/base/default

D.
app/frontend/default/default

E.
skin/frontend/default/default

F.
app/frontend/design/default/default