Final answer:
The term meaning sarcastic or to mock scornfully is 'Sardonic'.
Step-by-step explanation:
The term that means sarcastic, or to mock scornfully, is B. Sardonic. None of the other options (salubrious, sartorial, sanguine) fit this definition. Sardonic specifically refers to a kind of humor that is derisive, cynical, or mockingly disdainful. Using a sardonic tone might convey bitter amusement or skeptical mockery. For example, if someone were to say something optimistic about a generally bad situation in a tone that suggests they don't really believe things will get better, that would be expressing a sardonic attitude.
The word that means sarcastic or to mock scornfully is Sardonic. It is an adjective used to describe a mocking or sarcastic tone or attitude. For example, if someone makes a sardonic comment, they are making a mocking or scornful remark.