When a high number of buyers continue to purchase a firm's products even when prices increase, what is the effect on the firm's profitability?

When a significant number of buyers persist in purchasing a firm's products despite price increases, this indicates strong demand and customer loyalty towards the firm's offerings. This unwavering demand allows the firm to raise prices without experiencing a proportionate decline in sales volume. As a result, the firm can generate higher revenue and potentially enhance its profit margins, ultimately strengthening profitability.

Furthermore, such resilience from buyers suggests that the firm may possess unique selling propositions, brand loyalty, or differentiated products that make consumers less sensitive to price changes. This scenario often leads to improved overall financial performance since maintaining a stable customer base while increasing prices can boost profits significantly.

The other options reflect scenarios that do not apply here. A weakened profitability indicates a loss of sales due to price sensitivity, an unchanged profitability suggests a balance where price changes neither help nor hinder financial performance, and fluctuated profitability implies inconsistency in profit levels, which doesn't align with the described stable demand in response to price increases.