Answer: a)Disruptive innovation
Explanation: Disruptive innovation is the innovation technique indulges in market through new market strategy and value network. This techniques damages the existing market market and its values .The displacement of the current product extincts from the market through this technique.
Other options are incorrect because paradigm shift is influence losing in the market and sustaining innovation is used for the improving the product's marketing and value .Thus, the correct option is option(a).