Answer:
B. Scientific research on the body
Step-by-step explanation:
B is the most plausible answer because option A and D will not answer your research question about sexual hormones (from a scientific perspective) and option C will have information which will not help you make conclusions since newspaper take their information from other sources and sometimes leave out chunk of data or information to fit it in one page.
Therefore, best option is B to look into scientific research on body where you'll likely encounter research related to blood rushing and sexual hormomes.