Medal for who select the word that best completes the sentence:

counselors challenge their patients to do something to overcome their struggles.

a. irate
b. constructive
c. keen
d. notorious

I think the correct answer is C. keen. 
Keen, meaning something that would be done with eagerness. The counselor wants to help the patient with their struggles, meaning the patient is in a time of difficulty. An activity that would require the patient to develop enthusiasm would be beneficial. 

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