Final answer:
Polyps at more advanced stages can accumulate mutations and develop into cancer, which highlights the importance of regular colonoscopies that can identify and remove pre-cancerous polyps to prevent colorectal cancer.
Step-by-step explanation:
When asking what happens to polyps at more advanced stages of colorectal cancer, it is important to understand that most colon cancers originate from benign mucosal growths called polyps. Over time, these polyps can accumulate mutations and progress from benign to malignant. The correct answer is C) They become cancerous. Through the process of colonoscopy, these pre-cancerous polyps can be identified and removed before they turn into cancer. This is why regular screening is critical for the prevention of colorectal cancer, especially for those over 50 years of age or with a family history of the disease. While some benign tumors may stop growing or not pose a threat, those that continue proliferating and become capable of damage or metastasis are considered malignant.