Refer to the exhibit. The connection between SW2 and SW3 is fiber and occasionally experiences unidirectional link failure. An architect must optimize the network to reduce the chance of Layer 2 forwarding loops when the link fails. Which solution should the architect include? 

Answer options:

A. Utilize BPDU filter on SW3.
B. Utilize root guard on SW1.
C. Utilize BPDU guard on SW1.
D. Utilize loop guard on SW2.

D