Answer: Focus
Step-by-step explanation:
The overall cost leadership is a kind of generic strategy which mainly focuses on the encouraging the customers to purchase goods on low cost and also appeal them on a industry wide market. This also offers an competitive advantage of industry worldwide.
The differentiation is a strategy which encourages the customers based on the uniqueness of goods.
The focus is a strategy which focus on narrow market segment using both uniqueness of goods and low cost as competitive advantages at the international level.