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Social Studies, 21.10.2020 16:01 Beth6013

After completing the experiment, Ben realized that he had used the hand sanitizer first, then he went directly to the first soap, and then directly to the second soap. Thinking this may have skewed his results, he decided a better procedure was to A) squirt the sanitizer into a bacterial colony, and observe the effects. B) wash his hands with soap first, then scrub them with sanitizer directly afterward. C) squirt sanitizer into one bacterial colony, water into another, and water mixed with soap into a third. D) cover his hands with the bacterial colony, then scrub them with sanitizer and wait to see if he got sick.

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