Final answer:
The strategic principles evident in Mr. Martínez's comment are Walmart's buyer power and cost leadership.
Step-by-step explanation:
The strategic principles evident in Mr. Martínez's comment are Walmart's buyer power and cost leadership (Option A). Walmart's massive scale allows it to negotiate lower prices from suppliers, giving them a significant advantage in purchasing power. This allows Walmart to offer cheaper prices to customers compared to their competitors.