Tom was very glad          to attend the ceremony. [ ]

A. being allowed      

B. to have been allowed

C. having allowed  

D. to have allowed

阅读材料，回答问题。

讲起八一历史长，南昌打响第一枪。工人士兵齐暴动，红军战士最光荣。朱德率领队伍走，进军湘南改红军。秋收暴动毛 * * ，闹得湘东遍地红。井冈山上朱毛台，创建四军建奇功。

（1）材料中涉及哪三个历史事件？

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（2）“四军”指哪支部队？

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