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.

Ex Input:
After observing several dogs running, students ask the following question: Do dogs with long hair run faster than dogs with short hair? How can the students best answer their question?  
 (A) record the weights and heights of many dogs (B) measure the speeds and hair lengths of many dogs (C) research to find the type of dog with the longest hair (D) race one long-haired dog against one short-haired dog

Ex Output:
B


Ex Input:
An Earth Science class is planning a field trip to a quarry to look for fossils. Which item will be important for the students to wear during the field trip to prevent damage from solar radiation?  
 (A) disinfectant (B) suntan lotion (C) safety goggles (D) ear protectors

Ex Output:
B


Ex Input:
Which of the following activities should be omitted from scientific inquiry?  
 (A) changing data to fit expected results (B) designing and carrying out investigations (C) formulating detailed hypotheses (D) communicating results to others

Ex Output:

A