Walmart started as a small American discount retailer in $1945,$ and now it has become the world's largest retailer that operates more than $11,300$ physical stores in more than $27$ countries and employs around $2\mathrm{.}2$ million workers. Its strategy has been characterised by offering a wide range of products at a low price, seeking efficiencies out of their supply chain to maximise productivity, and reducing outlays, with low operational and overhead costs. Walmart offers a wide variety of products, such as groceries, furniture, clothing, home appliances and electronics. Nowadays Walmart owns supermarkets, discount stores and neighbourhood markets in different parts of the world.

Which ONE following statement best describes the business $/$ competitive strategy of Walmart? $($choose ONE answer$)$

A$)$ Walmart has developed a cost leadership strategy through managing efficiently their cost, and as a result their prices are low.

B$)$ Walmart has developed a focus differentiation strategy because it has an efficient distribution channel that allows the company to negotiate the best deals.

C$)$ Walmart has developed a differentiation strategy because it offers a unique customer experience combined with low prices.

D$)$ Walmart has developed a combination of differentiation and Blue Ocean strategy as the company has been adding complementary products.