D. It's a quick way to draw a reasonable conclusion without a lot of testing.
Step-by-step explanation:
Deductive reasoning is a process of reasoning from one or more statements so as to reach a logical conclusion. It is commonly used in everyday life, as we can quickly come to a reasonable conclusion. If we are certain that all the statements are true, and we follow the rules of deductive logic, the conclusion we reach will certainly be true. However, a conclusion we reach through deductive reasoning can also be wrong in some cases, if the statements we rely on are false.