Which of the Following Is True of Coronary Heart Disease

Which of the following is true of coronary heart disease (CHD) ?

A) By age 20, half of the adults in the United States have at least one major risk factor for CHD.
B) Women who take estrogen to reduce the risk for osteoporosis are at significantly higher risk for CHD.
C) Aging becomes a significant risk factor for women who are 75 and older.
D) Women younger than 45 years of age tend to have higher LDL cholesterol than do men of that age, but this difference disappears after menopause.
E) Levels of the amino acid homocysteine, which protects artery walls, are typically higher in women than in men.