Why does the kapo assign easier work to wiesel?

from the story: Night by Elie Wiesel

sonnet 130 follows the typical rhyme scheme of the form abab cdcd efef gg and is composed in iambic pentameter,a type of a poetic metre based on five pairs of metrically weak/strong syllabic positions.the first line exemplifies iambic pentameter.

to create suspense.

for me i cant do homework without music, so, i guess i would say faster with it, than without it. for me at least.

i believe the answer is d : )