Brianna has a sweet tooth. She cannot resist the urge to eat fudge brownies and chocolate tarts. She relishes feasting on sugary food items. However, being of a slim build, she wants to maintain her weight. She often gets depressed about her uncontrollable eating urges and consumes emetic, a drug to induce barfing. Brianna is most likely suffering from__________.
a) bulimia nervosa
b) bipolar disorder
c) anorexia nervosa
d) obesity