Which statement best captures the author’s point of view and purpose in this article?
a. third person point of view allows the author to explore the ethical mistakes of a psychologist.
b. third person point of view allows the author to describe an influential psychological experiment.
c. first person point of view allows the author to highlight his views on the proper and improper methods of psychological experiments.
d. first person point of view allows the author to encourage readers to be careful of conforming to social roles.

I will say A

Explanation:

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.

substitute y = 2x - 4 to x + 2y = 12:

x + 2(2x - 4) = 12     use distributive property

x + (2)(2x) + () = 12

x + 4x - 8 = 12     add 8 to both sides

5x = 20     divide both sides by 5

x = 4

put the value of x to the first equation:

y = 2(4) - 4

y = 8 - 4

y = 4