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).

[Q]: Paragraph: Rougher surfaces have more friction between them than smoother surfaces.
 Question: A piece of sandpaper was rubbed across a glass table, then the sandpaper was rubbed across some gravel. The friction will be less between 
 Choices: A)the sandpaper and the glass table or 
B)the sandpaper and the gravel.
[A]: the sandpaper and the glass table or


[Q]: Paragraph: Bigger stars produce more energy, so their surfaces are hotter.
 Question: Would a small star be 
 Choices: A)hotter 
B)colder
[A]: colder


[Q]: Paragraph: The longer the exposure, the more light that the telescope can gather to make the image.
 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 
 Choices: A)longer 
B)shorter
[A]:
longer