In which three ways should the design of the STP domain be optimized for server and application performance?

Refer to the exhibit.

Your company designed a network to allow server VLANs in a data center to span all access switches. In the design, Layer 3 VLAN interfaces and HSRP are configured on the aggregation switches.

In which three ways should the design of the STP domain be optimized for server and application performance? (Choose three.)
A . Use loop guard on access ports.
B . Use PortFast on access ports.
C . Use root guard on access ports.
D . Align Layer 2 and Layer 3 forwarding paths.
E . Use BPDU Skew Detection on access ports.
F . Explicitly determine root and backup root bridges.

Answer: B,D,F