How did Da Vinci make it hard for people to read his notebook?

Question: How did Da Vinci make it hard for people to read his notebook?

Options:

Using Braille
Butting His Notebook Underground
Writing From Right To Left
Writing In Chinese

Correct answer:

Writing From Right To Left

Other game answers:
Find the answers to guess the gif, logo quiz 2015, emoji puzzle and emoji nation.
You can find other questions and answers of trivia crack at triviacrackcheats.org (other languages are also available, for this game).