disease is an unhealthy state of

a. organ system
b.the entire body
c. an organ
d.all are true

The correct answer is d. all are true.

A disease can refer to an unhealthy state of an organ system, the entire body, or even an individual organ. It can manifest as a result of various factors such as infections, genetic disorders, poor lifestyle choices, or exposure to toxins. To determine the answer to this question, one can remember the definition of disease and its scope.