A researcher observes two behavior categories in an athletic competition: avoidance and persistence. To manage the observation p
eriod, the researcher observes each behavior category in alternating time intervals during the athletic competition. Which method was used to manage the observation period?
<span>Syphilis, gonorrhea, chlamydia, and HIVHerpes, HPV, and HIVOnly syphilis and HIV<span>Doctors and health centers are required by law to report information on all STIs.</span></span>
