Multiple Choice
When Liam started training for a marathon, he twisted his ankle. Now every time he tries to run, his ankle hurts. Thus, he has decided to stop running for now, though he hopes to try for the marathon next year. Liam's injury is serving as a:
A) positive reinforcer.
B) negative reinforcer.
C) positive punisher.
D) negative punisher.
Correct Answer:

Verified
Correct Answer:
Verified
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