A network engineer must create a Layer 2 switch block design that has deterministic convergence and is loop-free at Layer 2. Which two switch block elements are needed to meet the requirements? (Choose two.)
A. Layer 3 link between distribution switches
B. HSRP with interface tracking on uplinks to core switches
C. RPVST with equal bridge priority on distribution switches
D. VLANs that do not span access switches
E. Layer 2 link between distribution switches
