SAT Inferences Question
All stainless steel contains varying amounts of iron, carbon, and corrosion-inhibiting chromium. However, ferritic stainless steel, often used for cooking utensils, contains a higher percentage of chromium (at least 10.5%) than does austenitic stainless steel and a higher concentration of iron, which is responsible for its magnetic properties. Unlike ferritic stainless steel, austenitic stainless steel has a face-centered cubic crystalline structure resulting from the addition of nickel to the alloy. Austenitic stainless steel has two subtypes: the 200 series, often used for washing machines, and the 300 series, which has more nickel than the 200 series and is often used for mining and chemical equipment or compensators. Thus, stainless steel used to manufacture Which choice most logically completes the text?
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The trap here
Inferences: the answer you knew before you read the passage — SAT inference answers must follow from the text alone. Outside knowledge is how the tempting wrong choices get chosen.