Which spotter is commonly used to remove stains caused by coffee, tea, urine, and feces?

The correct choice is the tannin spotter, and it is specifically designed to target and effectively remove stains caused by tannin-rich substances, which include coffee, tea, and some biological stains such as urine and feces. Tannins are natural compounds that can create difficult-to-remove discolorations due to their ability to bind with fabrics and fibers, which is why specialized cleaning agents are necessary for effective treatment.

When addressing such stains, a tannin spotter works by breaking down these complex organic compounds, making it easier to rinse them away and restore the carpet or fabric to its original condition. Its formulation is tailored to neutralize the staining agents without damaging the underlying material.

The other options focus on different types of stains. An oxidizing spotter is designed to remove stains that involve oxidation, while an enzymatic spotter is more suited for breaking down proteins found in organic stains like blood or food. A surfactant spotter, on the other hand, works by reducing surface tension to help lift soil and stains from the surface but does not specifically target tannin-related stains. Therefore, the tannin spotter is the ideal choice for effectively addressing the specified types of stains.