A student, following an upcoming federal election, recalls hearing the incumbent president state that "the national unemployment rate for the United States of

A student, following an upcoming federal election, recalls hearing the incumbent president state that "the national unemployment rate for the United States of America is 4.5%." The 4.5% represents ______.

A.a parameter only 

B.a statistic only 

C.a parameter or a statistic 

D. neither a parameter nor a statistic