An Engineer Is Designing a Layer 3 Campus Network Running

An engineer is designing a Layer 3 campus network running EIGRP between the core, aggregation, and access layers. The access layer switches will be connected to the aggregation layer using Layer 3 copper connections. The engineer wants to improve convergence time for access layer switch failures. Which technique must the design include?

A) enabling BFD for EIGRP on the access layer uplinks
B) reducing the EIGRP Hello / Hold timer values
C) EIGRP summarization from core to aggregation layer
D) EIGRP summarization from access to aggregation layer