A cliché is an expression that is often repeated in art, literature, or real life to such an extent that it becomes overused and it loses its effectiveness. Some people might even consider such expressions trite or irritating. The word cliché, therefore, is often used pejoratively in order to indicate a lack of imagination or creativity.
Cliche is a commonly used statement or remark. Euphemism on the other hand is usage of inoffensive terms to convey anger or derision. This will be the Cliche.
An abstract concept is difficult to understand because of the unspecific character that is obtained from it.
The sentence that most effectively translates the abstract concept into a mental picture is option C. (Rumors) Whispers od doubt filled the empty halls like the reek of rotten eggs.