I would put b for your answer help this helps
It can’t be a smilie because nothing is being compared using like or as. It can’t be onomatopoeia because the following words is not used in that quotation, POW, WOW BOOM etc. It can’t be metaphor because nothing is being compared without using like or as, and it can’t be rhyme because nothing in here is being rhymed so it has to be Assonance.
<span>It is internal because Rachel is impatient as she waits for her birthday.</span>
Sorry, but You need to specify what book/story