With Regard to Correlation and Regression Analyses, Which of the Following

With regard to correlation and regression analyses, which of the following statements is erroneous?

A) correlation analysis identifies variables that move together without implying cause and effect relationships
B) linear regression defines the relationship between a single independent variable and a dependent variable
C) multiple regression seeks to determine the effect of several independent variables on a single dependent variable
D) in linear regression, the formula for a straight line is y = a + bx, where b is the intercept and a is the slope of a line or trend of the line