They are disease causing organisms.
Answer:
The endocrine system is a tightly regulated system that keeps the hormones and their effects at just the right level. One way this is achieved is through 'feedback loops'. The release of hormones is regulated by other hormones, proteins or neuronal signals. The released hormone then has its effect on other organs.
Explanation:
I beleive it is A. the others sound like they're too much
It is true you dont have to do soem hygine thinhs every day
