Which selected topping would add a tangy and creamy aspect to a potato?

Choosing sour cream as a topping for a potato adds a distinct tangy flavor and a creamy texture that complements the mild, fluffy interior of the potato. Sour cream's acidity enhances the overall flavor profile, making each bite more enjoyable. It pairs particularly well with the potato's starchy qualities, creating a delicious contrast.

In contrast, bacon bits add a crispy and salty bite but do not contribute the same creaminess or tanginess. Opting for nothing on the potato leaves the dish rather plain, lacking the enhancements that a topping can provide. Chives, while they offer a mild onion flavor and a slight freshness, do not deliver the rich and creamy experience associated with sour cream. Thus, sour cream is the best choice for adding that specific tangy and creamy aspect to a potato.