Final answer:
An outward expression of an individual's self-concept is represented by their lifestyle and attitudes, which include behaviors, activities, interests, opinions, and feelings that are visible to others, with lifestyle being the most immediate and observable expression.
Step-by-step explanation:
The question being asked relates to how individuals outwardly express aspects of their self-concept. Among the choices provided, c) lifestyle is the one that represents an outward expression of self-concept. Your lifestyle includes behaviors, activities, and interests that align with who you believe you are and is a reflection of your personal identity and values. Similarly, d) attitudes are a part of the outward expression of one's self-concept as they reflect what you think and feel about certain topics, which are often visible to others through your words and actions.
In terms of broader concepts, e) aspirations can also be considered an outward expression when those aspirations are communicated or pursued, as they represent the goals and dreams that stem from one's self-concept. However, when you consider the most immediate and observable expression, lifestyle is typically the predominant choice.