When a teacher considers boys as naturally better at mathematics than girls, it shows that the teacher is:

Correct option is B

Gender bias refers to the unfair differences in expectations or treatment based on a person's gender. In this case, assuming boys are naturally better at mathematics than girls reflects a gender-biased viewpoint.
Information Booster:
· Gender bias can affect children's self-esteem and learning outcomes.
· It can result in unequal opportunities for boys and girls.
· Teachers should foster an inclusive environment that promotes equal learning for all students.
· Research shows no inherent differences in mathematical ability based on gender.
Additional Knowledge:
· (a) ethical: Being ethical refers to following moral principles, which would involve treating all students equally.
· (c) moralistic: Moralistic behavior involves adhering strictly to conventional moral standards, not necessarily related to gender bias.
· (d) right-minded: This term suggests fairness and ethical behavior, which would not support gender bias.