TASK DEFINITION: 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.
PROBLEM: A negative effect of the invention and use of paper is the  
 (A) increased use of glass bottles. (B) increased number of trees cut down. (C) decreased pollution in trash dumps. (D) decreased amount of books to read.

SOLUTION: B

PROBLEM: Which will most likely result from a low-pressure weather system?  
 (A) warm temperatures (B) cloudy conditions (C) clear conditions (D) cool temperatures

SOLUTION: B

PROBLEM: Which is most likely a learned behavior for a raccoon?  
 (A) making a den in the hollow of a tree (B) opening a trashcan looking for food (C) moving four legs while running (D) having a litter of four babies

SOLUTION:
B