Rachel Gets a Lot of Joy from Building and Racing

Rachel gets a lot of joy from building and racing cars made from scraps of wood and metal she finds in her fathers' workshop and spends hours reading books and learning new techniques to make her cars move faster. Rachel's car hobby would be considered

A) self-determining.
B) intrinsically motivating.
C) gender inappropriate.
D) extrinsically motivating.
E) naturally validating.