The literary device that is used in this sentence include option A: imagery.
What do you mean by literary device?
A literary device is refers to as a different method a particular author is used to generate special effect in their writing. Like, simile, metaphor, allusions and personification etc.
Moreover, literal devices are used to define the author's words and views by making storytelling clear and realistic.
According to given paragraph, the aroma of a sweet and sugary smell in the baked cookies made the day full of happiness of writer. People can imagine the smell and sweetness without tasting the food.
Therefore, correct option is A.
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