To reduce their risk for prostate cancer men over 40 are encouraged to have

Answer;
To take an annual PSA test; 

To reduce their risk for prostrate cancer men over 40 are encouraged to have an annual PSA test.

Explanation; 
PSA test measures the level of PSA in a man's blood. Prostrate specific antigen is a protein by normal, as well as malignant, cells of the prostrate gland. The blood level of PSA is often elevated in men with prostrate cancer.

C) reflection (i also looked up the other choices just to make sure)