The question tests the understanding of the term 'virtual' in the context of technology, where it is often used to describe things that exist or happen in a simulated or online environment, rather than in physical reality. Option B correctly captures this usage. Option A is the opposite of the term's meaning in this context. Option C confuses 'virtual' with 'vulnerable', which are two distinct words with different meanings. Option D incorrectly associates 'virtual' with the concept of adding water or flowing, which relates to 'wax' and is irrelevant to the meaning of 'virtual'.