Which of the following statements about random error is true?
Answer A. Random error is error that occurs when there is a consistent mistake made by the measurer, such as not taring the balance before making a series of measurements.
B. Random errors have an equal chance of being too high or too low.
C. Random errors are always either too high or too low for the same series of measurements.
D. A and B are true. E. A and C are true.