How is the British sale of opium to China a double standar

I'm pretty sure opium use was outlawed in GB during the time. So they didn't allow their own subjects to use it but got another country hooked on it

herodotus taught this. herodotus was an ancient greek historian who was born in halicarnassus in the persian empire. he is known for having written the book the histories, a detailed record of his "inquiry" on the origins of the greco-persian wars.

when in doubt choose c

it's what my teacher told my class when we were going into psats