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.