You Design a Research Study to Investigate If There Is

Multiple Choice

You design a research study to investigate if there is a relationship between two variables. You measure each of them without manipulating either one. If you find that Variable A is increasing at about the same rate as Variable B is increasing, what can you conclude?

A) Variable A is causing Variable B.
B) Variable A is negatively correlated with Variable B.
C) Variable B is causing Variable A.
D) Variable A is positively correlated with Variable B.