You are given a science question (easy-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:
If 1 kg of the compound toluene melts at -95°C, then 500 g of toluene will  
 (A) melt at -47.5°C. (B) melt at -95°C. (C) boil at 95°C. (D) boil at 47.5°C.

Ex Output:
B


Ex Input:
Which animal eats only plants?  
 (A) Cat (B) Dog (C) Lion (D) Rabbit

Ex Output:
D


Ex Input:
Paleontologists are scientists who study evidence of past life on Earth. Which method do paleontologists most likely use to determine the forms of life that existed millions of years ago?  
 (A) examine current species of plants and animals (B) research past species in the library (C) interview older scientists (D) examine fossils records

Ex Output:

D