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
Answer: AD