Read the given statements about correlation carefully and identify the correct statements. A. A positive relation means that the variables vary in the same direction. B. If two or more variables are related in a statistical way, is sufficient to conclude that a cause and effect relation exists. C. A negative relation means that the two variables vary in the opposite direction. D. Pearson's Product-Moment Method is a method used to calculate r. Choose the correct answer from the options given below: