Answer:
D. differentiation.
Step-by-step explanation:
Option A - Low-cost leadership refers to the strategy in which the customers are getting the products at a low cost. Companies seek to achieve cost leadership, but with efficient manufacturing and productive employees cannot help them to achieve that.
Options B and C - With local employees, it is challenging to achieve global operation, and focused differentiation is the selling of unique products to the customers. So, those are wrong answers.
Option D - With the help of differentiation strategy, companies seek effective manufacturing and productive employees to attract customers to take their products from the thousands of products in the market. Therefore, it is the correct answer.