单选题A customer has a pSeries that needs to be upgraded from AIX Version 5.1 to AIX Version 5.2. The customer wants to retain /etc/passwd. Which of the following installation types should be used？（）A Preservation InstallB Retention InstallC Overwrite Instal
题目
单选题
A customer has a pSeries that needs to be upgraded from AIX Version 5.1 to AIX Version 5.2. The customer wants to retain /etc/passwd. Which of the following installation types should be used？（）
A
Preservation Install
B
Retention Install
C
Overwrite Install
D
Migration Install