Can you tell me what it mean when you are diagnosed with colon cancer stage 3?

Like getting a C : Cancers are graded like tests or exams. Grade 1 is an a, grade 2 is a b, grade 3 is a c and grade 4 is a d. With a c or a d, you need tutoring to get a better grade and it is always better to have an a or a b. Chemotherapy is tutoring and gives you the opportunity to raise your grade to a higher score. This is a simple explanation of a complex, confusing staging system of colon cancer.