
Passage: Taking the grade as the unit, a school divides the students' academic performance into four grades: excellent, good, medium and poor. In a school year, the top 10% of the total score of each examination is excellent; The last 30% is poor, and the rest is good and medium. In the last academic year, there were more excellent students in grade 12 than in grade 11.
Question: If the above judgment is correct, which of the following options must be correct?
A. A.Students with poor grades in grade 12 are less than those with poor grades in grade 11
B. B.There are more students with poor grades in grade 12 than in grade 11
C. C.There are more excellent students in grade 12 than good students in grade 11
D. D.There are fewer students with excellent grades in grade 12 than those with good grades in grade 11
Answer: