The answer should be B.
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I'm almost positive that this is DNA. LMK if I'm correct.
Answer – 20 percent
A Blood Alcohol Level (BAL) of .12 reduces the distance a pedestrian can be seen by a driver by about 20 percent. Four standard drinks consumed during the first hour of drinking, will increase a person's BAL to about .1%
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Skipping steps that might not be as useful or ones that are time consuming. THEY ALL MAKE A DIFFERENCE