Final answer:
The risk for a shortened life expectancy cannot be determined solely by the occupation of an individual.
Step-by-step explanation:
The fact that someone is a college professor, homemaker, nuclear engineer, or nurse does not necessarily determine their risk for a shortened life expectancy. Several factors can contribute to an individual's risk, such as lifestyle, genetics, and pre-existing medical conditions. To accurately assess the highest risk for a shortened life expectancy among these individuals, a nurse would need to consider additional information, such as their current health status, medical history, family history, and lifestyle choices.