How should text be on a good presentation slide?

Correct answer: Clear and readable

Effective visual communication requires slide text to be clear, sufficiently large, concise, and readable from the audience’s position. Thus option B is correct. Very small or unclear letters cannot be read easily; extremely long text competes with the speaker; and crowded text without spacing makes the message confusing. A good slide presents key points with suitable spacing, contrast, and simple wording so viewers can understand the information quickly.