Consuming gluten, a protein composite found in foods processed from wheat and related grains, causes allergic reactions in some adults. Medical records indicate that the percentage of adults in our country who have seen a doctor for gluten allergies has increased significantly in the last four years. Either our adults have been exposed to more gluten, or they have developed a greater sensitivity to them.
Which of the following is an assumption on which the argument depends?
【选项】
The percentage of the population in our country of adult age has not changed relative to four years ago.
选项是否正确？