If It Is Estimated That 25% of Cases of a Disease

If it is estimated that 25% of cases of a disease can be attributed to poor diet, 30% to poor hygiene, 40% to tobacco smoking and 20% to high alcohol consumption which
One of the following statements is true? (Select all that apply)

A) Tobacco smoking has the highest population attributable fraction?
B) Tobacco smoking has the highest attributable fraction?
C) There is a problem with the data because the % sum to more than 100%
D) Eliminating all four of these exposures would prevent all cases of this disease
E) B, C and D are all true