Final answer:
Cream hair colors are typically applied with a brush for precision and even distribution. Combs, rollers, and sponges are not commonly used in this application process.
Step-by-step explanation:
Cream hair colors are usually mixed with a cream developer to achieve the desired color effect. For the application of cream hair colors, a variety of tools can be used, depending on the technique and the desired result. The correct answer to this question is that cream hair colors are generally applied with a brush. A brush allows for precise and even application of the hair color, ensuring that the product is evenly distributed throughout the hair. Combs, rollers, and sponges are typically not used for this purpose as they do not offer the same level of precision as a brush.