Consulting Business Intelligence (SBI) divides luxury consumers into three groups according to their attitude towards luxury products. Which one of the following does NOT explain the internal reason for luxury consumption? （ ）
A: Luxury is functional
B: Luxury is indulgence
C: Luxury is a reward
D: Luxury is too expensive
A: Luxury is functional
B: Luxury is indulgence
C: Luxury is a reward
D: Luxury is too expensive
