Which spanning tree implementation meets this goal?

Refer to the exhibits.

Exhibit 1

Exhibit 2

The company wants to minimize congestion on Link 1.

Which spanning tree implementation meets this goal?
A . Instance 1 = VLANs 4,6 Instance 2 = VLANs 5,7
Switch 2 instance 1 priority = 0 Switch 2 instance 2 priority = 1
Switch 3 instance 1 priority = 0 Switch 3 instance 2 priority = 1
B . Instance 1 = VLANs 4-5 Instance 2 = VLANs 6-7
Switch 2 instance 1 priority = 0 Switch 2 instance 2 priority = 1
Switch 3 instance 1 priority = 0 Switch 3 instance 2 priority = 1
C . Instance 1 = VLANs 4,6 Instance 2 = VLANs 5,7
Switch 2 instance 1 priority = 0 Switch 2 instance 2 priority = 1
Switch 3 instance 1 priority = 1 Switch 3 instance 2 priority = 0
D . Instance 1 = VLANs 4-5 Instance 2 = VLANs 6-7
Switch 2 instance 1 priority = 0 Switch 2 instance 2 priority = 1
Switch 3 instance 1 priority = 1 Switch 3 instance 2 priority = 0

View Answer

Answer: C