You are creating a Business Connectivity Services (BCS) entity.

You need to ensure that all data returned by the entity is available in search results.

Which type of method instance should you implement?

A.
Finder and GenericInvoker

B.
Finder and IdEnumerator

C.
SpecificFinder and GenericInvoker

D.
SpecificFinder and IdEnumerator

Explanation:
MNEMONIC RULE: “BCS data available = SpecifcFinder and IdEnumerator”

A SpecificFinder returns exactly one external item. This stereotype is used to read an item, given its identifier.

Implementing a SpecificFinder
http://msdn.microsoft.com/en-us/library/ff464399.aspx

An IdEnumerator method instance on the external system enables you to return the field values that represent the identity of Entity instances of a specific Entity.

Implementing an IdEnumerator
http://msdn.microsoft.com/en-us/library/ff464401.aspx