Which of the following can lead to a rate increase in life insurance premiums?

The option indicating that having a family history of certain diseases can lead to a rate increase in life insurance premiums is correct because insurance companies assess risk based on an applicant's health history, which includes genetic predispositions to illnesses. If there is a documented family history of serious health conditions (such as heart disease, diabetes, or certain cancers), insurers may consider the applicant at a higher risk of developing similar issues in the future. This perceived risk translates into higher premiums as the insurer seeks to cover potential future claims.

In contrast, being a non-smoker, maintaining a healthy weight, and exercising regularly are all associated with lower risks for chronic health problems. These factors typically result in lower premiums due to the decreased likelihood of health-related claims, as insurers favor applicants demonstrating healthier lifestyle choices.