I prefer to work here because salaries are higher here than（ ）in my country.A.that B.those C.

I prefer to work here because salaries are higher here than（ ）in my country.A.that B.those C.
I prefer to work here because salaries are higher here than（ ）in my country.A.that B.those C.

I prefer to work here because salaries are higher here than（ ）in my country.A.that B.those C.
those == the ones 因为salaries是复数形式.those / the ones 指代先前提到过的复数名词.