A college/university teacher plans to test his/her substantive research hypothesis in a major project. Which of the following statements are considered relevant in this regard?

A. Substantive research hypothesis has to clearly specify the relationship among variables

B. Research hypothesis may be directed at finding out differential effects or relationships

C. Null hypothesis should be formulated beforehend

D. There is direct support available for testing the substantive research hypothesis

E. The final decision on the research hypothesis may be reached indirectly by deciding the fate of the Null hypothesis

Choose the correct answer from the options given below: