You are designing a SharePoint Server 2007 solution. You create a BDC application definition that references a web service. The web service accepts a string as a parameter and returns a value to the SharePoint server. You need to modify the BDC application definition file to ensure that the data can be sent and received between SharePoint server and the web service.

What should you do?

A.
Define an Action parameter element with the Index property set to 1.

B.
Define an Action parameter element with the Index property set to 0.

C.
Define a Parameter element with the Direction property set to In.

D.
Define a Parameter element with the Direction property set to Return.