Answer:
a. product differentiation
Step-by-step explanation:
There are a variety of toothpastes in the market and now that the colgate introduces its new toothpaste, with a complete different composition and function, the tooth paste stands different from that already existing in the market.
Thus, since the toothpaste is completely different from those present in the market the product is different from those in the market.
Therefore, clearly here the strategy applied is Product Differentiation.