You are testing a hypothesis; “students learn more if they drink tea before sitting for study”. Your 20 experimental students drink tea before study; you test their learning by giving questions. Your 20 students of the control group should have all experimental conditions identical to the experimental group EXCEPT that;

  • (A)

    They should take tea with more milk and sugar

  • (B)

    They should take tea before as well as during study

  • (C)

    They should not take tea before study

  • (D)

    After taking tea, they should not sit for study

    ;
Correct Answer: A