Question

now the researchers plan to closely examine the neural circuits of the brain in the lab to find targets that, when shut down, could treat epilepsy as well as other conditions including parkinsons disease and chronic pain. source: bbc in this sentence, chronic means: capable of changing quickly from one condition to another existing as an essential constituent or characteristic very thin especially from disease or hunger or cold long - lasting or characterized by long suffering

Explanation:

The word "chronic" in medical - related contexts like talking about diseases such as Parkinson's and pain conditions typically means long - lasting. It is used to describe conditions that are persistent over a long period.

Answer:

D. long - lasting or characterized by long suffering