Which statement is true about the common cold? a. it typically starts with the symptom of a scratchy throat. b. it's a bacterial disease. c. it's not contagious. d. it occurs more commonly in adults than children

Which of the following statements concerning cancer and mutations is correct? a: cancer can only occur with a mutation in a somatic cell. b: usually, multiple mutations are required in different genes to cause cancer. c: none of the other answer options is correct. d: cancer can only occur with a mutation in a germ cell. e: usually, a single mutation is all that is required to cause cancer.