Which Two Design Characteristics of Resilient Ethernet Protocol on a Metro

Which two design characteristics of Resilient Ethernet Protocol on a Metro Ethernet infrastructure are true? (Choose two.)

A) Resilient Ethernet Protocol provides fast convergence on Layer 2 ring domains
B) Unidirectional Link Detection Protocol can be used in combination with Resilient Ethernet Protocol
C) Resilient Ethernet Protocol cannot load balance VLAN traffic across a ring
D) Resilient Ethernet and Spanning Tree Protocol can reside on the same switch and on the same port
E) Resilient Ethernet Protocol and Spanning Tree Protocol rings or domains can share a common link