Why is food one of the most variable parts of a budget? Food is inexpensive in all regions.
Fast food is a choice anyone can afford.
There is a range of choices at every price level.
Some people prefer to eat food that is very expensive.

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.