Final answer:
Stress, depression, and easy access to drugs contribute to substance abuse in veterinary team members, a serious concern that may lead to addiction and the need for rehabilitation. (option d)
Step-by-step explanation:
Stress, depression, and easy access to drugs all contribute to substance abuse in veterinary team members. The related concept from the reference material given is tolerance, which occurs when a drug user requires more and more of a given drug in order to experience the same effects of the drug.
Substance abuse within the veterinary field can be particularly concerning due to the ease of access to various drugs and the high stress nature of the work. Taking note of the serious implications of substance abuse, veterinary team members may experience dependency and addiction requiring rehabilitation efforts.
Hence, the answer is option d