The correct answer is B) White. Corrosive liquids and acids must have a white label according to US Coast Guard regulations. This is because corrosive materials are considered hazardous substances that require clear identification for safe handling and storage. The white label helps distinguish these materials from other types of hazardous goods, which may use different color labels (e.g., yellow for flammable liquids, red for explosives). The other answer choices are incorrect because they do not align with the regulatory requirements for labeling corrosive liquids and acids. A yellow label is typically used for flammable materials, a skull and crossbones symbol indicates a poison, and a red label is more commonly associated with other hazardous goods like fire hazards.