单项选择题
A.$hadoop jar hadoop-examples-25.0jar wordcount /data/input /data/output
B.$hadoop fs -hadoop-examples-25.0jar wordcount /data/input /dataloutput
C.$hadoop fs -hadoop-examples-25.0/jar wordcount /data/input /data/output
D.$hadoop jar hadoop-examples-2.5.0/jar wordcount /data/input /dataloutput