Plz answer the question below asap plz

Which of the following factors most consistently contributes to the speaker’s believability? a the age and experience of the speaker b the physical environment in which the speech is delivered c the sincerity, knowledge, and trustworthiness of the speaker d the position of the thesis statement in the speech

How did the language of the gettysburg address differ from the language in the secondary source about this speech?

Of these events in top of the food chain which happens first