Last weekend Victor helped his sister move into her new apartment. He didn't really feel like helping her, but he wanted to put her "in his debt," because he is planning to ask her if he can stay at her place for a couple of weeks.

By helping his sister move, Victor was thus apparently engaging in:

A. egoistic helping.
B. altruistic helping.
C. zero-sum helping.
D. non-zero-sum helping.

Annette suffers from recurrent episodes of gorging on large quantities of food followed bypurging through self-induced vomiting in order to prevent gaining weight. although her weight is well below normal to the point that others see her as "skin and bones," she worries excessively about being fat. she also has impulse control problems in other areas of her life.she is suffering from ) binge-eating/purging anorexia2) restrictive anorexia3) bulimia nervosa 4) binge-eating disorder