Teacher: You are given a short paragraph, a question and two choices to answer from. Choose the correct answer based on the paragraph and write the answer(not the key).
Teacher: Now, understand the problem? If you are still confused, see the following example:
Paragraph: Many of the worlds people live with water scarcity, and that percentage will increase as populations increase and climate changes.
 Question: John's town used to have lots of water, back when there were only a few hundred people. However, now that the town holds several thousand people, the water availability is 
 Choices: A)scarce 
B)plentiful
Solution: scarce
Reason: Based on the information given in the paragraph, population growth will make water more scarce, so that is the correct answer.

Now, solve this instance: Paragraph: As greenhouse gases increase, changes will be more extreme.
 Question: Reid notices changes in the weather and temperature from 100 years ago. This likely was caused by _____ greenhouse gas levels. 
 Choices: A)increased 
B)decreased
Student:
increased