instruction:
You are given a question or fill-in-the-blank question, two answer options (Option1 and Option2) and an Explanation. Your task is to find the correct answer (return the string of the correct option, not option1/2) for the given question from the given options and using explanation.
question:
Question: Mona is flying in a hot air balloon. As she floats lower in the air the air temperature decreases. What will happen to the air pressure? 
 Option1: increase 
 Option2: decrease 
 Explanation: Increasing air temperature decreases atmospheric pressure.
answer:
increase


question:
Question: Mona is excavating a deep tunnel as part of an exploratory committee. As she travels upwards back from the Earth, what can she expect will happen to the temperature? 
 Option1: increase 
 Option2: decrease 
 Explanation: Temperature increases with depth inside the Earth, so melting of rocks is more likely to occur at greater depths.
answer:
decrease


question:
Question: Mike needed to get a good picture in a dark room, but couldn't turn on a light. In order to get the brightest photo, Mike made the exposure 
 Option1: longer 
 Option2: shorter 
 Explanation: The longer the exposure, the more light that the telescope can gather to make the image.
answer:

longer