The correct option is B <!--td {border: 1px solid #cccccc;}br {mso-data-placement:same-cell;}-->
Her smile was like the sun coming out of the clouds.
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A simile is formed when two unlikely things are compared with each other with the comparison words 'like' or 'as'. Here, the smile is compared to the sun coming out of the clouds, which means that it was very bright and drove away the sadness. It uses the comparison word 'like'. Hence, it is a simile. On the other hand, the phrase 'apple of our eyes' says that the person is the apple, which means that the person is very precious to the speaker. However, it does not compare the person to an apple directly with any comparison words. Hence, it is a metaphor.