I would say A, that seems like the best answer! :)
Frederick Douglass's purpose<span> in </span>writing his<span> autobiography was not only to show the way in which slavery degraded slaves but also to show the way the institution of slavery degraded slave masters.</span>
Answer:
lifelessly, casually, halfheartedly, sluggishly, idly, lazily, spiritlessly, Desultorily, indolently, wearily, sleepily, listlessly, lackadaisically, tiredly, languidly.
Explanation:
these are some antonyms for laboriously which means :in a way that takes considerable time and effort.
In is the answer
Hope it helps :)