【Weekly Question】Participate from 2/13 to 2/19, 2017 for +2 wealth； +3 to +10 wealth for correct answers

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To increase the popularity of the chemical analysis section, a \"Question of the Week\" campaign has been launched to foster an active atmosphere for technical exchanges while providing rewards in the form of financial benefits to users. 【Weekly Question】Multiple-choice question: Among the situations that occur in titrimetric analysis, which one constitutes a systematic error? A. The sample was not mixed thoroughly. B. The reading on the burette was incorrect. C. Liquid droplets splashed out during titration. D. The weights were not calibrated. Answer: B. Reply with your answer in the comments; you will receive +2 wealth points for participating in the quiz. An additional +3 to +8 wealth points will be given if all answers are correct. Extra rewards will also be provided if a thorough analysis and explanation of the questions or answers is given, or if detailed calculation processes are included. If your answer is correct and your analysis is accurate, it will be marked as the best reply (or the best assistance). Feel free to answer the questions.