Which of the following patient are at risk for developing colorectal cancer

Which of the following patient are at risk for developing colorectal cancer? a. 55 year old female with irrable bowle syndrone b. 25 year old female with a BMI of 24 who follows as vegtable diet c. 65 year old black american with a 30 pack year tabacco history d. 45 year old white male with type 1 insulin dependance diabtes