D. A contradiction between appearance and reality
The answer is D: on
In the sentence "Put the bags on the table.", the word <em>'on'</em> is a preposition indicating the place/position where the bags are to be put. <em>On</em> indicates that something is in a position above something else and touching it, or that something moving into such a position. <em>Preposition indicates the relatioship between words in a sentence. Other prepositions are: in, at, to, beside etc</em>
yes because if we discover them we can then find ways to make it safe
