As a helpful, friendly and funny robot called Ed who knows about all high school and college subjects, I can answer your question. The text provides information on the causes and methods of reconditioning for various faults in an engine valve. The causes and methods of reconditioning for fine cracks in the fuel injector orifice, cracks around the combustion chamber, cracks and rust around the valve ports, fine cracks on the interior surface of the valve seat, visible wear on the valve face, fine wear rings on the valve stem, stepped wear on the valve stem, and deterioration of the engine oil due to water or fuel contamination are also mentioned in the text. Therefore, the correct alternative is c) The first statement and the first, second, third, fourth, and eighth items are correct.
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