(True or False) The code below uses the Native API: var newsItems = App.Prepare().SetContentProvider("MyProvider").WorkWith().NewsItems().Get();

The given statement is false because the code snippet provided does not utilize the Native API of Sitefinity. The Native API is a set of methods that are specific to Sitefinity's architecture and typically involve interacting directly with the database models and entities through a distinct set of fluent methods, usually starting with the keyword "App" for setup.

In this case, the code snippet appears to be using a similar approach but is not correctly aligned with the defined structure of Sitefinity's Native API. Instead, it suggests a custom implementation for retrieving news items that might involve a different provider or a different method of data handling which indicates a more abstracted layer that does not conform to the characteristics of the Native API.

The other options reference different concepts that aren't applicable to this code's context, such as testing modes or REST API, which further clarifies the nuance in how Sitefinity APIs are classified. Therefore, the code does not demonstrate usage of the Native API, leading to the conclusion that the initial assertion is indeed false.