The image here shows the components of a purchase order:

The application requires that the total number of items (TotalItems) in the Trailer Record equals
the sum of the quantity ordered (QtyOrdered) for each purchase order. This verification can be
performed by a component rule. Which component should have the component rule?

A.
TotalItems

B.
QtyOrdered

C.
Detail Record

D.
Trailer Record

Explanation: