When Pasteurization was first invented many people could and would become ill to certain products due to tainting with certain bacteria and fungi. Additionally these various bacteria would cause the taste of these products to sour.
Originally Pasteur would come up with the method of heating up a certain food or substance, to kill these pathogens, when working to improve the longevity and taste of Wine. His method however is now used around the world for use in purifying Milk and Dairy, Wine, fruit juices, etc... and reducing the risk of food poisoning, while also improving the economics of these products.
Genital HSV-1 outbreaks reoccur less regularly than genital HSV-2 outbreaks. There is no cure for genital herpes. Using condoms properly can reduce the risk of cross infection but it is not 100% safe. Genital herpes can still be transferred between partners even with the use of condoms. Once you have herpes, you are at risk of it reoccurring, Research has shown that 80% of people who contract HSV-2 will have at least one occurrence. Generally HSV-2 tends to reoccur four to six times per year. In contrast, only 50% of people who contract HSV-1 will have at least one reoccurrence. The HSV-1 infection only tends to reoccur once a year.
They are apart of the brainstem
Pretty confident that it is A, judging by that the word composition is used as a combination or a ratio of 2 things. Also none of the other options make sense.