Frosting is a metaphor of language in a layer cake given in one’s study unit. On the above choices, the word that fits the ‘layer cake’ or ‘metaphor of language’ is letter B: prescient. Prescient, by definition is the ability to be omniscient that is all knowing, knows the past, present and future. Like for example, God’s existence. The rest of the choices are adverbs of time or frequency or even adjective and does not answer to the needed word,