<span>"The mud of the river-bed swallowed up these obscure acts of vengeance—savage, yet legitimate; these unrecorded deeds of bravery; these silent attacks fraught with greater danger than battles fought in broad day, and surrounded, moreover, with no halo of romance."
The above passage conveys the courage of the resistance movement. In particular the reader is persuaded by the words "bravery" and "danger" in "...deeds of bravery..." and "...fraught with greater danger than battles fought in broad day...".</span>
The type of biased language is, "b. ability," mainly because Haley states, "Would you get a move on? Are you deaf?" and it's insulting Kenneth's ability, as if she was saying he can't hear what's clearly being said.
The answer is apprenticeship (B) for someone who wants to earn the credentials but in less than 4 years.