Which of the Following Statements Is Incorrect Regarding the Defense

Which of the following statements is incorrect regarding the defense mechanisms of the female reproductive tract?

A) Vaginal pH is continually around 5 throughout the lifespan of the female to prevent the growth of pathogenic organisms.
B) After puberty,glycogen is secreted into the vaginal mucus,which is fermented into acid by the normal biota thus lowering the pH.
C) Before puberty and after menopause,vaginal mucus remains around pH 7.
D) The microbiota of the female vaginal tract varies throughout her lifetime in response to vaginal pH; lower pH encourages the growth of organisms that prevent invasion by pathogens that could harm a developing fetus.