48. To which of the following does the word “its” in line 15 refer？ (A) estrogen (B) society (C) roles (D) medical science

50. Which of the following statements CANNOT be supported by information found in the passage？ (A) Estrogen is chiefly a female hormone and testosterone is chiefly a male hormone. (B) All males began life as females. (C) Testosterone can be used to alter the sex of post pubescent females. (D) Estrogen therapy may help to increase the bone density of women with osteoporosis.