单选题以下关于SGA和PGA的叙述正确的是（）APGA是SGA的一部分，SGA是共享的，但分配后的PGA是不共享的BPGA是客户机内存的一部分，而SGA是服务器内存的一部分CPGA和SGA都是服务器内存的一部分，前者是私有的，后者是共享的DPGA与SGA的总和等于服务器主机内存的总和
单选题
以下关于SGA和PGA的叙述正确的是（）
A
PGA是SGA的一部分，SGA是共享的，但分配后的PGA是不共享的
B
PGA是客户机内存的一部分，而SGA是服务器内存的一部分
C
PGA和SGA都是服务器内存的一部分，前者是私有的，后者是共享的
D
PGA与SGA的总和等于服务器主机内存的总和
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