问题：

[多选]

Refer to the exhibit. All network links are FastEthernet. Although there is complete connectivitythroughout the network， Front Line users have been complaining that they experience slowernetwork performance when accessing the server farm than the Reception office experiences.Based on the exhibit， which two statements are true？（）

A . Disabling the Spanning Tree Protocol would improve network performance
B . Changing the bridge priority of S1 to 36864 would improve network performance
C . Changing the bridge priority of S1 to 4096 would improve network performance
D . Changing the bridge priority of S3 to 4096 would improve network performance
E . Upgrading the link between S2 and S3 to Gigabit Ethernet would improve performance
F . Changing the bridge priority of S2 to 36864 would improve network performance