Refer to the exhibit. The command spanning-tree guard root is configured on interface Gi0/0 on both switch S2 and S5. The global configuration command spanning-tree uplinkfast has been configured on both switch S2 and S5. The link between switch S4 and S5 fails. Will Host A be able to reach Host B？（）
- A Yes. Traffic can pass either from switch S6 to S3 to S2 to S1， or， from switch S6 to S5 to S2 to S1.
- B No. Traffic will pass from switch S6 to S5 and dead-end at interface Gi 0/0.
- C No. Traffic will loop back and forth between switch S5 and S2.
- D Yes. Traffic will pass from switch S6 to S3 to S2 to S1.
- E No. Traffic will either pass from switch S6 to S5 and dead-end， or traffic will pass from switch S6 to S3 to S2 and dead-end.