A company will not achieve competitive advantage if it has resources that are

The correct choice highlights that valuable resources must also be rare or unique to contribute to a competitive advantage. When resources are valuable but commonly available, they do not provide a distinctive edge over competitors. In a competitive market, if many companies have access to the same resources, those resources lose their effectiveness in creating a competitive advantage.

For example, if a company relies on a widely available technology or a common material that many competitors can also utilize, it cannot leverage those resources to stand out in the marketplace. Therefore, while the resources may contribute to operational effectiveness, they won't enable the company to differentiate itself or sustain a competitive advantage in the long term.

In contrast, resources that are unique and difficult to replicate can provide a strong competitive position, as they allow a company to exploit opportunities that others cannot easily access. Expensive but not beneficial resources do not contribute to effective competition, and resources that are rare but easily substituted are vulnerable to competitive pressures, making them less effective in securing a sustainable advantage. Thus, the nuanced understanding of resource value relative to availability is critical in developing a competitive strategy.