Depends on how you referenced Janes story and how you answered the question. For example if you just tracked through the text ppointing out the times love was gained through suffering (being excepted in Lowood after being put on the stool, the whole Mr Rochester thing) then you'd be alright but you could only reach a certain level of depth. To reach the highest grades you could make reference to Bertha's suffering in a loveless marriage and St Johns proposal of marriage and that through suffering ''a sort of love would follow''. Or you could disagree with the point all together, saying Janes happily ever after where she found love wasn't through suffering but through the luck of her uncles death and inheritance.
English is such a broad subject but I've found in almost every essay to get the high grades you want you should both agree and disagree with the question and approach it from as many angles as possible. To narrow a view tends to leave you repeating the same points in different words.