单选题Which of the following best describes how locks are used in DB2?（）ATo maintain control of updated rows for commit processingBTo ensure only committed changes are altered by another applicationCTo allow two applications to update the same row of data simultaneouslyDTo prevent multiple applications from accessing the same data simultaneously
单选题
Which of the following best describes how locks are used in DB2?（）
A
To maintain control of updated rows for commit processing
B
To ensure only committed changes are altered by another application
C
To allow two applications to update the same row of data simultaneously
D
To prevent multiple applications from accessing the same data simultaneously
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