Final answer:
Significant others are not typically considered an individual factor affecting business ethics. Factors such as nationality, age, religion, and education are individual characteristics that influence ethical perspectives in business.
Step-by-step explanation:
The individual factor that does not affect business ethics from the choices provided is d. Significant others. Business ethics are influenced by a variety of individual factors including nationality, age, religion, and education. However, significant others are typically not categorized as an individual factor in the context of business ethics, as they represent social and relational influences rather than individual characteristics or personal attributes.