7. josé is afraid to ask tina on a date because he fears she will say no. josé is experiencing a. positive self-talk. b. negative attitude. c. self-confidence. d. negative self-talk.

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.