【单选题】
A ki11 -15 should be avoided. Use other methods such as mysqladmin shutdown or systemct1 stop mysqld.
B kill -15 and kill -9 are effectively the same forced shutdown that risk committed transactions not written to disk.
C kill -15 carries out a normal shutdown process, such as mysqladmin shutdown.
D mysqld_ safe prohibits commands that would harm the operation of the server. An error would be returned by the kill command.
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