Concept:Choose the word that means “not clear enough to be read.”Explanation:The correct answer is “illegible.”It is used when handwriting or printed text is too unclear to read.“Tiny” means very small in size.“Eligible” means having the right qualification or being suitable.“Untidy” means messy or not neat.Only “illegible” fits the meaning of being impossible or difficult to read.Therefore, it is the best word to complete the sentence.Answer:D. illegible