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).

[EX Q]: Paragraph: But the more computing power that goes into the model and the care with which the scientists construct the model can increase the chances that a model will be accurate.
 Question: Stephanie had designed a machine learning algorithm to help predict earthquakes. Today, her new supercomputer arrived and she will soon run the algorithm on the less powerful computer. The new computer will _____ the accuracy of the model's predictions. 
 Choices: A)increase 
B)decrease
[EX A]: decrease

[EX Q]: Paragraph: The more dense the medium, the slower the light moves.
 Question: A very rarefied medium will cause light to move 
 Choices: A)faster 
B)slower
[EX A]: faster

[EX Q]: Paragraph: With a higher concentration of hydrogen ions, a solution is more acidic but has a lower pH.
 Question: Eric measures 20 hydrogen ions per 100ml in one solution. Another solution has 30 hydrogen ions per 100ml. The solution with more hydrogen ions is _____ acidic. 
 Choices: A)more 
B)less
[EX A]:
more