You conducted an experiment to investigate whether termites demonstrated orientation behavior. You noticed that termites were attracted to black ink after some preliminary observations. You hypothesized that termites were attracted to a chemical in black ink. which of the following setups provide best control to your hypothesis?
A. Black pen line vs. Blue pen line
B. Black pen line vs. indentation made by wood stick
C. Black pen line vs. blank paper
D. Black pen line vs. Black pencil line
Answer: D. Black pen line vs. Black pencil line
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Fill in the blank(s) with the appropriate word(s).