What is the answer for this question?

It is quite likely that in your calculations from Part A resulted in a non-zero percent error. This is somewhat expected in experimental work. Consider the possible sources of error/discrepancies that might have occurred between our theoretically and experimental moment values. Which do you think are non-negligible (ie had a measurable influence on your results). *Please note, multiple answers can be chosen. Right answers are worth 1 mark, wrong answers chosen result in -1, 0 marks awarded when left blank. This is to discourage you from randomly choosing answers or selecting all. (J a. The density of the dye was not considered in your calculations U b. The weights provided were not accurate. (J c. Observation errors when taking measurements U d. The quadrant tank was not appropriately levelled before measurement