Which of the following is an appropriate thesis statement?

question 9 options:

knowing a foreign language is a very useful skill that can one advance in a career, relate better to others, and open one's mind to the ideas of another culture.

i think that learning a foreign language is the best thing i have ever done, and i think everyone should learn a second language.

why should people know a foreign language?

my project is going to tell about the importance of knowing a foreign language.