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.
One example: Which event can cause a large rock to become soil over time?
(A) decaying (B) an earthquake (C) a landslide (D) weathering
Solution is here: D
Explanation: 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: Storm chasers are people who get close to storms in order to observe them and take measurements. What knowledge have storm chasers added to the study of storms that has helped most modify theories of storm formation?
(A) their views of storm damages (B) their personal experiences in storms (C) their data collected at the beginning of storms (D) their enthusiasm for studying different storms
Solution:
C