What is it that makes a text difficult to read?

✂️ a) The length of words and sentences.

✂️ b) The length of sentences and paragraphs.

✂️ c) The percentage of unknown words and length of words.

✂️ d) The percentage of unknown words and length of sentences.

✂️ e) The length of paragraphs and percentage of unknown words.

Responda: What is it that makes a text difficult to read?