Both Jean and Sandra Are a Students at a University

Both Jean and Sandra are A students at a university, and both major in general studies. Jean takes an introduction to physics course after having completed a chemistry course the previous semester. Sandra takes the same physics course without having previously taken any other college-level science course. Sandra has a much more difficult time learning the material than Jean does. Jean's learning was probably facilitated by

A) zero transfer.
B) negative transfer.
C) general transfer.
D) specific transfer.