The ... is a cost-saving option compared to a full installation of SAP Process Integration (PI). Choose the correct answer.

The … is a cost-saving option compared to a full installation of SAP Process Integration (PI). Choose the correct answer.

The … is a cost-saving option compared to a full installation of SAP Process Integration (PI). Choose the correct answer.
A . Advanced Adapter Engine (AAE)
B. Advanced Adapter Engine Extended (AEX)
C. System Landscape Directory (SLD)
D. Enterprise Service Repository (ESR)

Answer: B