Irony, because one's actions go in the opposite direction than intended.
the answer is<em> </em><em>is</em><em>.</em><em> </em>
Because there is written <em>one</em> <em>of</em><em> </em><em>the</em><em> </em>best new security systems. And it is singular.
your answer would be formal !!!!!!!!!!!!!!!!!!!!!!!!
Cisneros plays around with connotation and denotation with the word only by using the word in different ways. As in this example sentence, it says they are the only daughter, inferring that there is one female child, but they say they are only a daughter, inferring that they feel they can be nothing more than a daughter.