Use the fact that the answer is there. If your answer is not one of the five answer choices given, you should assume that your answer is incorrect and do the following:
Reread the question carefully – you may have missed an important detail or misinterpreted some information.
Check your computations – you may have made a mistake, such as mis-keying a number on the calculator.
Reevaluate your solution method – you may have a flaw in your reasoning.