Teacher: You are given a science question (hard-level) and four answer options (associated with "A", "B", "C", "D"). Your task is to find the correct answer based on scientific facts, knowledge, and reasoning. Do not generate anything else apart from one of the following characters: 'A', 'B, 'C', 'D'. There is only one correct answer for each question.
Teacher: Now, understand the problem? If you are still confused, see the following example:
Which event can cause a large rock to become soil over time? 
 (A) decaying (B) an earthquake (C) a landslide (D) weathering
Solution: D
Reason: Under the action of heat, cold, rain, wind, and other atmospheric factors, the rock breaks down physically into small fragments that become the parent material of the soil. Also, atmospheric factors change according to weather.

Now, solve this instance: Which action does not represent a safety procedure in the lab?  
 (A) tasting chemical samples (B) using heat-resistant gloves if glassware is hot (C) tying back long hair (D) washing a chemical splash with lots of water
Student:
A