Psychologists use the scientific method to do each of the following EXCEPT ______ what they study

How can improvements in health and nutrition change menarche?

a. Improved health and nutrition can lower the age of menarche. b. Improved health and nutrition can increase the age of menarche. c. Worsening health conditions and nutrition can cause an increase in the frequency of menstruation. d. Worsening health conditions and nutrition can prevent fertility.

What should a good informed consent form include?

a. Clearly state the risks and benefits that are part of participation in a study. b. Be less no less than a page and no more than 2 pages in length. c. Ask for the participant's contact information. d. Ask the participant to waive his/her future legal rights.