Which statement gives the correct description of infectious diseases?
- AThey are diseases caused by environmental factors that are not passed from one person to another.
- BThey are diseases caused by a fault in the DNA that can be passed from a parent to their offspring.
- CThey are diseases caused by a lack of a nutrient in the diet, such as a vitamin or mineral.
- DThey are diseases caused by a pathogen such as a bacterium, fungus, protoctist or virus.