A network engineer is designing a network that must incorporate active-active redundancy to eliminate disruption when a link failure occurs between the core and distribution layer. What two technologies will allow this ?

A.	Hot Standby Routing Protocol (HSRP)
B.	Rapid Spanning Tree Protocol (RSTP)
C.	Equal Cost Multi-Path (ECMP)
D.	Multichassis EtherChannel (MEC)
E.	Rapid Spanning Tree Protocol Plus (RSTP+)