Which of the following is a common coffee brewing method?

Drip coffee is a widely recognized brewing method that utilizes a drip system to extract flavors from coffee grounds. This technique involves water being heated and then dripping through a filter containing coffee grounds. As the water passes through, it absorbs the coffee's oils and extracts, resulting in a flavorful cup. Drip coffee makers are common in households and cafes due to their ease of use and ability to brew multiple cups at once, making it a staple in coffee preparation.

In contrast, cold brew is a specialized method that involves steeping coffee grounds in cold water for an extended period, while bubble brew and infused coffee do not represent mainstream brewing techniques and are less commonly encountered in everyday coffee-making scenarios. This context highlights why drip coffee stands as the most conventional choice among the options provided.