Regina and Ronald Both Earned a Perfect Score on Their

Regina and Ronald both earned a perfect score on their World History exam.Based on research from the text on how teachers make sense of student success,how will their teacher understand each student's perfect score?

A) Regina is smart;Ronald worked hard.
B) Regina worked hard;Ronald is smart.
C) Regina and Ronald both worked hard;Ronald is also smart.
D) Regina and Ronald are both smart;Ronald also worked hard.