Among the 10 leading causes of death in the united states, these two conditions account for almost half of all deaths.
a. alzheimer’s disease and heart disease
b. diabetes and stroke
c. heart disease and cancer
d. kidney disease and cancer

The answer is letter B.

Chronic diseases are known to be long-term medical conditions that are generally progressive. It is known to be the major cause of disability and the major cause of premature adult deaths all over the world. World Health Organization (WHO) estimates that almost half of all chronic disease deaths occur in people under the age of 70.

Some common chronic diseases include diabetes, stroke, chronic respiratory problems, and heart disease. These different diseases may be inherited or are a result of unhealthy lifestyles. Chronic diseases directly affect the quality of life of individuals.

From the 10 leading causes of death in the United States, the duo that accounts for more than half of them is heart disease and cancer - c. 

These two sources of death - which are also largely dependant on lifestyle, will account for the majority of deaths this year in the US.