The answer would be B, Converting a color image in processing software.
1) failing to cook food adequately,
2) holding food at incorrect temperatures, 3) using contaminated equipment,
4) practicing poor personal hygiene and 5)purchasing food from unsafe sources. small, living organisms that can be seen only through a microscope. poisons produced by pathogens, plants or animals.
There are a lot, try reading the chapter again and looking at some familiar devices