Answer: c. It can be accounted for by careful calibration of your instruments.
Explanation:
Systematic error can also be considered as systematic bias. It is a consistent, repeatable error that is associated with the use of faulty equipment or flaw in the experimental design.
These errors are caused by the use of measuring instruments which are incorrectly or poorly calibrated, or incorrectly used by the experimenter.
Thus the error can be reduced by careful calibration of the instrument.
