The "reverse" multiple-choice question in the AP U.S. History exam is easily identified by the words "EXCEPT" or "NOT" in all capital letters in the question or sentence stem. The question basically asks you which of the five possible choices DOES NOT BELONG. Once you identify a "reverse" question, the best way to handle it is to ignore the "EXCEPT" or "NOT" marker. Then put an "X" through or cross out all of the answers that do belong. The one you're left with is correct. "Reverse" questions are very common and make up about 10 percent of the multiple-choice section.