The answer is D. Hope this helps!
Answer:
The reproductive system or genital system is a system of sex organs within an organism which work together for the purpose of sexual reproduction. Many non-living substances such as fluids, hormones, and pheromones are also important accessories to the reproductive system.
Physical math is more of you writing your answers on paper and solving them out mental is doing it in your head.
Explanation:
having multiple sex partners
having unsafe sex
Having had a related std history