Question

the root chron means time. what does the word chronic mean?
happening in a way that is difficult to believe
happening frequently or for a long duration
happening in an official or formal way

Explanation:

The root "chron" means time. The word "chronic" relates to time - a chronic condition or event is one that occurs over a long period or frequently. The first option refers to something unbelievable (not related to time), the third to official/formal (also not related to time). So the correct meaning is related to frequency or long duration.

Answer:

B. happening frequently or for a long duration (assuming the middle option is B, with the options labeled as A, B, C where A is "happening in a way that is difficult to believe", B is "happening frequently or for a long duration", C is "happening in an official or formal way")