The way you share your ideas depends a. tone & style of your essay. b. the thesis statement c. which topic will have the widest appeal d. your audience's familiarity with your topic

D. Your audiences familiarity with your topic.

Explanation:

The manner in which the speaker displays and presents his/her ideas is always determined by the audience's familiarity with the topic as the knowledge of the audience of the topic assists to determine the level of research and presentation skills(tone and style) to effectively convey the desired message. The topic is selected also as per the needs and interests of the audiences as they are of supreme importance. Thus, the audience's prior knowledge of the topic would shape the manner of presentation and style of the representation of ideas.

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.