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.
--------
Question: A student counts ants in an ant colony every day at the same time. The student writes the date of observation in one column in a notebook and the number of ants counted on each date in a second column. Which best describes how the student arranged the information?  
 (A) pie chart (B) data table (C) bar graph (D) scatterplot

Answer: B


Question: The ounce, the pound, and the ton are units of  
 (A) time. (B) weight. (C) length. (D) distance.

Answer: B


Question: Measurements of carbon dioxide concentrations in the air taken over the past decade have shown a  
 (A) leveling off. (B) slow increase. (C) steady decline. (D) dramatic increase.

Answer:
D