"Input authenticity" means ________.
A、Genuine: The input is created only for the realm of real life.
B、Altered: There is no change in meaning, but the original one is no longer as it was for the absence of glossing, visual resetting, pictures etc.
C、Adapted: The input is created for real life, though with words and grammatical structures changed to simplify the text.
D、Simulated: The input is written by the author as if the material is genuine with many genuine characteristics.