Which One of the Following Teachers Is Definitely Keeping in Mind

Which one of the following teachers is definitely keeping in mind Piaget's idea that assimilation and accommodation are both necessary for learning and cognitive development to occur?

A) Mr.Ames presents brand new topics every day, expecting the continual novelty to keep students interested and motivated.
B) Mr.Baretta shows students how a new topic is similar to the things they already know, but also different in certain ways.
C) Ms.Chang makes sure that students have learned one topic very, very well before moving on to another topic.
D) Ms.Doherty uses a lot of drill-and-practice exercises, encouraging students to work faster every time.