What is the common ratio from the above
a 2
b 3
c 4
d 5

Which of these is most likely to prevent pregnancy? a. tracking of female body temperature to identify ovulation times b. proper condom use c. male withdrawal before ejaculation d. proper spermicide use

If gonorrhea is a treatable infection why do so many men experience severe damage and even in infertility or joint infections as a result of leaving it untreated

How can the stress response be used in a way. for example to build resilience.