A Time Series Graph Reveals Whether There Is A_{--------------------}

Multiple Choice

A time series graph reveals whether there is a_{--------------------} , which represents_{--------------------} .

A) relationship between two variables; a cross-section relationship
B) trends in two variables; unrelated variables
C) trend in a variable; a general tendency for the variable to rise or fall
D) relationship between two variables; a trend in a variable
E) cross-section relationship; a general tendency for the variables to rise or fall