I believe the answer is D. It makes more sense and is the most correct grammatically.
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~ Luna
Answer:
valuable; rare
Explanation:
A valuable capability is that which gives a firm some competitive advantage. Core competencies are the operational activities that a company does best. A business’s core competencies are what distinguish it from other rival companies in its industry. While Rare capabilities are capabilities that a small amount of, if any, competitors possess. Those type of capabilities that are costly or impossible to imitate.
from the above explanation we can deduce that the modern technology implementation in the airline industry has made it possible to have valuable ptograms and softwares for carring out several task which are no longer scarce to procure.
Data availability is the one related to the server being down.
