What type of beverage can be supercharged?

Supercharging a beverage refers to enhancing it by adding an extra shot of liquor to increase its potency or strength. In the context of the options provided, single liquor is the correct choice because it directly aligns with the concept of supercharging in terms of alcoholic beverages.

When you supercharge a drink, you typically add an additional measure of liquor to an existing beverage, making it stronger. This process can apply to various mixed drinks, where a single spirit component can be intensified with an extra pour. The term "single liquor" encompasses a range of spirits, meaning that you can select any type of liquor to enhance a drink. Using only beer or cocktails would limit the scope of what can be supercharged, as beer is generally consumed alone without additional liquor and cocktails often contain multiple ingredients, complicating the concept of a single enhancement. Soft drinks, while they can be mixed with alcohol, are not typically considered for the term 'supercharge,' which is usually reserved for the enhancement of alcoholic beverages.