Read about Connor, and then answer the question. Connor is writing an argumentative essay about language.

Which best supports his claim that students should learn a second language?

In my opinion, Italian is the most beautiful of all the languages. It sounds musical and romantic.
Teachers say that students who learn to speak a second language tend to perform better in other academic subjects.
Mandarin Chinese is spoken by more people in the world than any other language.
Students in other countries usually study English, even when they are quite young.