With Respect to Correlational Designs, Which of the Following Statements

With respect to correlational designs, which of the following statements is INACCURATE?

A) Alike experiments, correlational designs are normally non-intrusive
B) Correlational designs help researchers to establish causal relationships between variables
C) Correlational designs do not require any experimental manipulations
D) In correlational designs the experimenter looks at the relationship between two variables only