Answer:B. Not be approved because he has violated the ethical standard of confidentiality/privacy.
Step-by-step explanation:
If he wants to conduct an experiment unbiasedly in order to find out how each gender performs in geography test , he shouldn't know which scripts belongs to which gender however now since they have written their names it would be easy to see as he marks the test which scripts belongs to who .
There is a risk of being bias now when he already knows who is who as he give the marks, ethical guidelines requires that the people's privacy should be maintained at all times throughout the experiment in order to establish bias free results.