Sammy is in third grade. When he won the spelling bee, he felt proud of his accomplishment. However, when he could not complete his arithmetic assignment on time, he felt incompetent. Which of Erikson's developmental stages does this reflect?
A. initiative vs. guilt
B. autonomy vs. shame and guilt
C. trust vs. mistrust
D. industry vs. inferiority

D. industry vs. inferiority                                  

Explanation:      

Industry vs. inferiority: In psychology, the term "industry vs inferiority" is described as one of the different stages of the psychosocial theory which was introduced by a psychologist named Erik Erikson. Industry vs inferiority is considered as the fourth stage in the theory and generally starts from six years of age and lasts through eleven years of a child's age.

During this stage, a child learns to accept evaluations and to be productive related to his or her efforts or else he or she becomes discouraged and might feel incompetent or inferior.

In the question above, the given statement represents industry vs inferiority stage.