Dahrell is facing an important test and expects to do poorly. he is so anxious that he cannot concentrate or study effectively, but he figures that since he’s going to do badly anyway, he should not bother. this is an indication of dahrell's:

Self-esteem

Explanation:

Self-esteem can be defined as the personal view of an individual about his/her own worthiness and value. It deals with what an individual feels about his/her value, how worthy or unworthy he/she is.

Thus we can say that self esteem works as a motivational function which ensures more or less that an individual will take proper personal care and explore one's full capabilities and complete potential.

Here, the behavior of Dharell indicates his low self esteem