Toronto is the largest city of the country( )about 2.5 milli

Toronto is the largest city of the country( )about 2.5 million people
A.with B.for C.from D.at
选什么,

with
with短语可以表示事物属性 状态 特点
如：
He is a man with a lot of friends.
There is a lake with lines of trees around it.
China is a country with a long history.