Final answer:
Colonoscopy is an acceptable and recommended method for colorectal cancer screening, useful in detecting and removing precancerous polyps, especially for those over 50 years or with certain risk factors.
Step-by-step explanation:
An acceptable method for colorectal cancer screening is a colonoscopy. This procedure is both diagnostic and therapeutic, allowing for the identification and removal of precancerous polyps before they can evolve into malignant tumors. For individuals over 50 years of age, or for those with a family history or additional risk factors, regular screening for colorectal cancer is recommended. During a colonoscopy, a physician can directly visualize the lining of the large intestine using a camera fixed to the end of a flexible tube, and remove any polyps found using a surgical instrument inserted with the scope. Although colonoscopy is invasive and requires preparation, it is considered the gold standard for the diagnosis and prevention of colorectal cancer.