Emma went to a science fair. One of the students at the science fair performed an experiment to test the effects of music on a plant growth. The student concluded from her results that music made plants grow approximately 10% faster. Which of the following questions should Emma ask the student to find out if the student's conclusion was valid?
1. What types of plants were used in the experiment?
2. What was the experiment's control?
3. Was the experiment repeated more then once?
A. Two and three only
B. one only
c. one two and three
d. oneandtwo
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