Alliteration refers to the stylistic device wherein a number of words, which have the same 1st consonant sound, occur closely within a series.
Some obvious examples of alliteration are: -Alice’s aunt ate apples and acorns around August. <span>-But a better butter makes a batter better </span> Among your choices, the closest representation of alliteration is The Snack You Can Sneak. Although the choice "Simply the Best Snacks" does have 2 S's. The former has a better creative and rhythmic value.
So I would go for "<span>The Snack You Can Sneak" as the best answer here. </span>