The set of reasons or logical basis for a decision, belief, or course of action.
“The company's rationale for the layoffs was declining sales in the region.”
“The rationale behind the curfew is to reduce late-night noise complaints.”
Part 4 questions often ask why a person holds a certain viewpoint, and 'rationale' points directly to that reasoning. When you see this word, look for the explanation that follows it, since it usually contains the core justification tested in the questions.
Synonyms: reasoning, justification, basis