Three of the Following Students Are Not Academically Engaged

Three of the following students are not academically engaged. Which one is academically engaged?

A) As two of the students in Jay's class group discuss the science experiment they just completed,Jay talks to another student about his new iPad.
B) Sue looks out the window during French class thinking about her soccer game later in the day.
C) While the rest of the class is writing their papers,Jeremy sits at his desk thinking of ideas for his paper,but does not write anything.
D) Bill draws cars in his notebook during math class ignoring the lecture his teacher is presenting.