In relation to cell differentiation and tumours, which of the following statements is/are correct? W. Benign tumours are always well-differentiated. X. Malignant tumours can be well-differentiated. Y. Well-differentiated tumours are comprised of cells that resemble the normal cells from which they arose. Z. Poorly-differentiated tumours usually have a higher risk of metastasizing than well-differentiated tumours. Question 47 Select one: a. Only W, X, and Y are correct. b. Only W and Y are correct. c. Only X and Z are correct. d. Only Z is correct. e. All are correct.