Which of the following is an incorrect statement with regard to the 'means of spread'?
 

The bacteria Staphylococci are normally found on the skin and can cause acne in normal individuals.

Genetic mutations can change how proteins function. Some types of genetic mutations change proteins in ways that cause healthy cells to become cancerous.

Eating acidic foods causes peptic ulcers

Excess weight and a lack of exercise are two factors that contribute to high blood pressure.