A risk manager reviewing an AI-powered insurance underwriting system notices that the model assigns lower premiums to customers whose web browsing activity suggests interest in healthy lifestyle content. Which risk does this MOST directly raise?

B is correct because using web browsing activity to infer health-related behaviors and incorporate them into pricing introduces proxy discrimination — the model may be using inferred proxies for protected health status or other sensitive attributes, creating legal and ethical risk. A is a model quality issue. C is a data sourcing risk but not the primary concern here. D is an infrastructure concern.