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3 votes
Please Help, If You Can, Thank You!
There's 2 Answers

Please Help, If You Can, Thank You! There's 2 Answers-example-1
User Byneri
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2 Answers

4 votes
B and D are the answers you are looking for.
User Arve Waltin
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6 votes
It’s C and D Because you’re the only things that remain the same throughout the experiment
User Vamsi Sangam
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