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.

[Q]: Jeremy walked at an average rate of speed of 3 kilometers per hour (km/h). How far had Jeremy walked in 30 minutes?  
 (A) 0.1 km (B) 1.5 km (C) 10 km (D) 90 km
[A]: B


[Q]: Gregor Mendel's observation of pea plants is an example of  
 (A) research-based evidence supporting a scientific theory. (B) a conclusion being tested by a hypothesis. (C) random testing during an experiment. (D) evidence for and against a scientific model.
[A]: A


[Q]: Which of these natural disasters are the most unpredictable?  
 (A) earthquakes (B) hurricanes (C) tornados (D) blizzards
[A]:
A