6) She was born in China and/so she was aware of different nat

Необходимо выбрать союз and или so.

She was born in China and so she was aware of different national.

Она родилась в Китае, поэтому была осведомлена о разных национальностях.

She was born in China so she was aware of different national.

Она родилась в Китае, и была осведомлена о разных национальностях.

Союз so (поэтому) подходит по смыслу больше.

Ответ: She was born in China so she was aware of different national.