If a Person's Task Is to Draw a 12-Inch Line

If a person's task is to draw a 12-inch line while blindfolded,which of the following types of feedback would probably produce the fastest learning-

A) being told "Correct" if an attempt is within 1 inch of the desired length
B) being told "Incorrect" if an attempt is more than 0.1 inches from the desired length
C) being told the amount an attempt is long or short,to the nearest half inch
D) being told "Long" if the attempt is too long,and "Short" if the attempt is too short