Final answer:
California security guards undergo training in the power of arrest because they have special authority in the state, even though it may not be their primary job to exercise police power.
Step-by-step explanation:
In California, security guards are required to be trained in the power of arrest because they are given special authority in the state. Although it may not be their primary job to exercise police power, they are authorized to detain individuals and make citizen's arrests under certain circumstances.
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