Before Mammography, Which of the Following Is or Are Appropriate

Before mammography, which of the following is or are appropriate information to give a patient?

A) Mammography involves a low dose of radiation and therefore can safely be performed annually.
B) Mammography can reveal breast cancer 1 to 2 years before a tumour is clinically palpable.
C) Although mammography is an accurate means of detecting breast cancer, it is only 85% accurate.
D) All the above.