In reverse engineering, the scientist get the result first, then they examine that result to find out what caused the result.
From the options , the one that filled this criteria of reverse engineering would be : A intelligence testing, which gathers data based on research subjects' test scores
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It might be said that Hedda destroyed the manuscript in order to "ruin Lovborg´s reputation" (option A). It might seem that the manuscript would redeem him from his past disgrace and, at the same time, it would establish him with a fine reputation in the future. It was considered a "child" for him and for Thea.
the answer is: Jerome chooses without prompting to help with the fire cleanup