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Which one of the following is NOT a default promotion?
1) If either operand of an arithmetic operator is unsigned long, the other operand is promoted to unsigned long. 2) If either operand of an arithmetic operator is unsigned int, the other operand is promoted to unsigned int. 3) If either operand of an arithmetic operator is int, the other operand is promoted to int. 4) If either operand of an arithmetic operator is double, the other operand...
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