Final answer:
Among the given options, the 45-year-old with a family history of hypertension is at an increased risk for developing high blood pressure.
Step-by-step explanation:
Hypertension, also known as high blood pressure, is a condition where a person's blood pressure is consistently elevated. Among the options given, the 45-year-old with a family history of hypertension is at an increased risk for developing high blood pressure. This is because hypertension can have a genetic component, and having a family history of the condition increases the likelihood of developing it.