Which of the following is a disadvantage of fabric dyeing?

Fabric dyeing indeed requires well-prepared materials, making this the correct choice. This is because the dyeing process relies heavily on the characteristics of the fabric being used, including its fiber content, weave structure, and pre-treatment processes. For effective dyeing, materials must often be pre-treated to remove impurities or enhance dye uptake, which adds to the complexity and labor involved in the dyeing process. If the materials are not properly prepared, it can lead to uneven dyeing, poor color fastness, or other undesirable outcomes.

While other options might present challenges in the dyeing process, they do not directly relate to the essential need for material preparation to achieve high-quality results. Lower production speed could occur depending on the dyeing process but is not universally true for all dyeing methods. High cost can vary based on the dyeing technique and materials used, but it doesn't universally apply to every dyeing situation. Limited color options may apply to certain dye types or processes, but advancements in dye technology have generally expanded color choices significantly. Thus, the necessity for well-prepared materials stands out as a fundamental disadvantage in fabric dyeing.