What is "technical theater" what the producer takes care of
what the director does
what the audience sees
what happens behind the scenes

the answer is:  

he is voicing feelings shared by all humans regardless of race.

in paul laurence dunbar's poem "we wear the mask," he replicates the words mask and we to emphasize how people in general -not just black americans- hide their true feelings. he suggests the masks cover people's faces and eyes, which are the main parts that display their emotions. he also thinks people's pain conceal behind those masks, so that they cannot see reality and nobody is able to see one another's sorrow.

right angles are formed by perpendicular lines. if the lines would extend, to make two intersecting lines, they would form four right angles.

the answer that is correct is the last option.