Answer:
C. Deductive reasoning
Explanation:
Deductive reasoning is a reasoning or logical process whereby a conclusion is drawn based on the belief of multiple premises that are generally assumed to be true. It is a logical process in which one or multiple statements reaches a logical conclusion.
In the question, the statement assumed to be true is that noble gases are unreactive because of their electronic structures.
The conclusion thus drawn from the premise is that if other elements could be made to achieve noble gases electronic structures (this is the reason why they are unreactive - the fact) they would be more stable.
Therefore, deductive reasoning moves from a wilder reasoning to a specific (narrower) reasoning.