when workers go out on to get better wages or working conditions, there is no garentee their demands would be met

i am pretty sure it is d.

well, i can't read it so i'll ask you questions about it : )

if you were a reader and you read the introduction, would you want to read more?

does it start with a question? if so, is it something you would want to read about?

and ask any friends or family for their opinion : )