Answer:
D. hidden curriculum.
Explanation:
Hidden curriculum: The term "hidden curriculum" is described as one of the side effects of "schooling" that are being learned yet not intended openly, for example, the transmission of beliefs, norms, and value that is being conveyed in a specific social environment and classroom.
In other words, it is described as the unofficial, unintended, and unwritten values, lessons, perspective that plenty of students learn in a specific school.
In the question above, the given statement signifies the "hidden curriculum".