Which feature contributes to text complexity by signaling author credibility?

• A. Text color
• B. Font size
• C. Coherence and credibility of the text
• D. Publisher's logo

Answer: (C)

Text complexity is raised not just by tough words or long sentences, but by how ideas are put together and how trustworthy the information feels. When a text is coherent, the ideas connect clearly with logical transitions and well-organized reasoning. When it’s credible, the claims are supported by evidence, sources, and a believable presentation of expertise. Together, these cues help readers engage more deeply: they can follow the argument, assess its validity, compare it to what they already know, and notice subtle nuances in tone and purpose. That deeper engagement requires more careful processing, which is what adds to the text’s complexity from a reader’s perspective.

Color and font size mainly affect readability or visual appeal, not the way the argument is built or supported, so they don’t signal credibility in the same way. A publisher’s logo might suggest branding or prestige, but it doesn’t inherently reflect the quality of the reasoning or the evidence backing the claims.