Which statement is incorrect?

a. if the solution in a buret runs out, it can be refilled during a titration.

b. to ensure accurate readings of a buret, the buret must be in an upright position.

c. the volume delivered by a buret is determined by method of volume by difference.

d. parallax will produce inaccurate volume measurements.

e. all buret measurements should be recorded with two decimals places.