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A group of screwdrivers produced in a day at a particular factory has a defect rate of 0.7%. Suppose a quality inspector randomly inspects 500 screwdrivers. Complete the following statement: The quality inspector should expect _ defective screwdrivers, with an error of CA. 3.5; 0.4% O B. 35; 0.4% O C. 1; 4.0% O D. 1; 0.4%