Answer: Option E
Step-by-step explanation: In simple words, functionality refers to the quality or the feature of a product to serve the purpose efficiently for which it is employed. In other words, functionality refers to the utility power of an input in relation to its output.
It means how much a product or a service is useful for its individual user. In the given case, the Canadian airline added some features that increased the value of their offered service to their customer by saving their time.
Hence we can conclude that the airline improved their functionality.