Which statement is true regarding the susceptibility of men and women to gonorrhea?

Which statement is true regarding the susceptibility of men and women to gonorrhea?
 
  a. Women have a 60-90 chance of contracting gonorrhea from a single incidence of unprotected sex with an infected man while an uninfected man has only a 20-30 chance of being infected by a woman.
  b. Men have a 60-90 chance of contracting gonorrhea from a single incidence of unprotected sex with an infected woman, while an uninfected woman has only a 20-30 chance of being infected by a man.
  c. Both men and women have a 60-90 chance of contracting gonorrhea from a single incidence of unprotected sex with an infected member of the opposite sex.
  d. Both men and women have a 20-30 chance of contracting gonorrhea from a single incidence of unprotected sex with an infected member of the opposite sex.