Which side option is made from potatoes cut into wedges?

The correct choice is C, as wedges are a specific type of side item made from potatoes that are cut into a wedge shape. This preparation method involves cutting whole potatoes into large, thick slices that retain the skin, giving them a unique texture and flavor compared to other potato sides.

Curly fries, while also a potato dish, are spiral-cut and usually have a different preparation process and seasoning, leading to a distinct appearance and taste. Onion rings consist of battered and fried onion slices, providing a completely different type of side that does not involve potatoes in its main ingredient. Bacon cheddar wedges, while they may sound similar, specifically include toppings of bacon and cheese, altering their classification from basic wedges to a more loaded side dish. Thus, when considering the options, wedges clearly stand out as the classic potato cut into wedges, aligning perfectly with the question's specifications.