Please help and no wrong answers T^T

What excerpt from a student essay maintains the most objective tone

Drag the tiles to the boxes to form correct pairs. match each excerpt to the type of characterization it uses.

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