Final answer:
Individuals with high incomes have extensive mobility and large activity spaces, meaning they can travel frequently and engage in activities over greater distances.
Step-by-step explanation:
The question presented concerns the geographic concept of mobility and activity spaces in relation to socio-economic status, specifically how these concepts apply to individuals with high incomes. When discussing the mobility of individuals with high incomes, we refer to their ability to move and travel, which is generally extensive due to their financial resources. Accordingly, their activity spaces, which are the areas where they conduct their daily activities, tend to be large as they have the means to engage in activities over greater distances and in more diverse locations.
To answer the question directly: The mobility of individuals with high incomes is extensive, and their activity spaces can be large. Therefore, the correct option is D) Extensive, large.