According to "The Negro Artist and the Racial Mountain," Hughes believes that young African American artists should cultivate public images that reflect mainstream society.
create art that is truthful and representative of their inner selves.
focus on themes and topics that are accessible to a select few.
O base their art on the beliefs of the general public.

B- create art that is truthful and representative of their innerselves

Explanation:

faulty parallelism is a construction in which two or more parts of a sentence are equivalent in meaning but not grammatically similar in form.

the correct version of this faulty parallelism in the sentence is:

the hikers knew that the hike was six miles, that it usually required the entire day, and it would not be wise to start after 10: 00 a.m.

the problem is the last sentence, the first two have a basic subject+verb+object structure.

so, to give a proper balance to the structure, or better said, to give a parallel structure, we must write a basic s+v+o structure in all three sentences:

the hikers knew that the hike was six miles, that it usually required the entire day, and it would not be wise to start after 10: 00 a.m.