B. do the experiment more than once
Explanation:
To do a multiple trials of an experiment, it is best to do the experiment more than once.
Experimental trials are mere replication of the procedures in an experiment.
Learn more:
Experiment brainly.com/question/5096428
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Answer:
the oxidation number is 4
Iron :)))))))))))))))))))))))))
crop rotation, green manure, and bone meal
I just looked it up. hope it helps