Headlines are the text or the headings indicated above any text. Both the headlines use objective and clear language in the text.
<h3>What is tone?</h3>
A tone is an attitude or the perspective by which the content is written by the writer. The tone can depict the nature of the text as the biased tones will be in favor of a certain thing.
Biased tones use upgrading and degrading words to describe the sides of the topics. This makes the text or the writer more favored over one topic.
Therefore, option D. both headlines are clear, and objective is the correct option.