Which flavor is part of the nine sweet options?

The flavor that is part of the nine sweet options is caramel. This choice is popular in various coffee and dessert offerings and is known for its rich, sweet taste. Caramel is often used as a flavoring syrup in drinks, enhancing both coffee and specialty beverages with its distinct sweetness that can complement a variety of other flavors.

Peach and mango are generally not included in typical sweet flavor offerings at Dunkin Donuts. While these fruity flavors might appear in seasonal items or specific recipes, they do not form a part of the core sweet options available in the regular menu lineup. Lavender, although a unique flavor, is not commonly recognized as a sweet option in the context of Dunkin’s standard offerings. This reinforces why caramel stands out within the provided choices as the flavor that aligns with the established sweet options.