Final answer:
The Rational Soul is the state of the soul that can deliberate about living well, according to Aristotle, because it is unique to humans and capable of reason, which allows for moral and ethical contemplation.
Step-by-step explanation:
The state of the soul that is capable of deliberating about what promotes living well is the Rational Soul. According to Aristotle's conception of the soul, there are different kinds of souls with distinct capabilities. The Vegetative Soul is responsible for growth and nutrient exchange in plants. The Appetitive Soul allows animals to desire things and move on their own. However, it is the Rational Soul, unique to humans, that can reason and therefore deliberate on what it means to live a good life. This deliberation goes beyond mere survival and bodily functions to include rational thought and moral considerations.
Deliberation about living well involves not only understanding and pursuing one's interests but also contemplating moral and ethical truths to guide one's actions. The Rational Soul is therefore the seat of wisdom and virtuous living in Aristotle's view of the soul. Aristotle believed that the ability to reason sets humans apart and allows for a higher level of contemplation and understanding of the good life, encompassing both practical and theoretical wisdom.
Answer: A) Rational Soul