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The correct answer is MC 312/DOT 412. This type of cargo tank is specifically designed to carry materials that are corrosive, such as sulfuric acid. The MC 312/DOT 412 tanks have certain features including being reinforced to withstand the corrosive nature of such substances, which is critical for ensuring safety during transportation. Their construction materials and design are tailored to protect against leaks and spills, which is paramount when transporting hazardous materials like sulfuric acid.
Other tank specifications, while designed for different types of materials, do not provide the necessary protections and structural integrity needed for handling corrosive chemicals. MC 338 tanks, for example, are typically used for liquefied gases but not corrosive liquids. MC 307/DOT 407 tanks are intended for hazardous liquids but do not provide the same level of protection against corrosion as the MC 312/DOT 412. Lastly, MC 331 tanks are designed for transporting compressed gases, thus are not suitable for carrying corrosive liquids like sulfuric acid at all.