The answer is letter A.
Congestive heart disease and asthma are examples of chronic conditions. Chronic diseases refer to diseases that have lasted for three months or more. It cannot be prevented by vaccines, cured by medications, and they do not just disappear. It requires medical attention and proper care. Congestive heart diseases (CADs) usually appear in many forms, the common ones are arteriosclerosis (hardening of the arteries) and atherosclerosis (blockages in the blood vessels). While asthma is a disease that is hereditary and can worsen when exposed to different environmental pollutants (e.g. smoke, extreme cold).