The correct option is A <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}-->
cat nap
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The animal idiom 'cat nap' means to take a short nap during the daytime. However, the animal idiom 'rat race' means a situation or way of life in which there is severe competition. Therefore, according to the given sentence, 'cat nap' is the correct answer.