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Which of the following isotopes is most likely to be unstable?
Retirement
The phase of life where an individual stops working full-time, typically associated with reaching a certain age or financial security.
Pre-retirement Employees
Workers who are nearing the end of their career phase, typically focusing on retirement planning and transition.
Replacement
The action or process of substituting a person or thing with another, often because the original is old, broken, or no longer suitable.
Costs
The monetary value required to produce goods or services, including manufacturing, labor, and materials expenses.
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