中国大学MOOC: 请指出以下品牌“Windows、Colgate、Rolex、Kissme”分别采用了哪一种品牌构成方法：

中国大学MOOC: Colgate offers toothpastes to its customers with different needs like sensitivity, whitening, and launches different toothpastes brands. This is called ________ marketing.

Colgate offers toothpastes to its customers with different needs like sensitivity, whitening, and launches different toothpastes brands. This is called ________ marketing. A: mass B: differentiated C: undifferentiated D: concentrated