Answer:
C) chronic disorders.
Step-by-step explanation:
A chronic disorder in a human may be defined as a health condition or some disease which is persistent or long-running in the effects or a disease which lasts with time. The word "chronic" is commonly used when the course of the health condition or the disease which lasts at the most three months or more than that.
In the United States, it is one of the most prevalent disease and mostly a costly health condition. Some of the severe condition are diabetes, cancer, fatty lever, alcohol related issues and many more.
There is a high chance of the increase in the incidence of the chronic disorders in the increasing elderly population as the immune system of the elderly person weakens.