What started the feud between the capulets and montagues?

romeo killed tybalt.
capulet challenged montague to a duel and montague never showed up.
capulet was in love with lady montague before she married montague.
the text does not say.

The text does not say that what was the reason that started the feud between the Capulets and Montagues. So, here the answer would be Option D.

Explanation:

Shakespeare’s “Romeo and Juliet,” is a narration of how two lovers are doomed due to the  ongoing war struggle between the two families the Capulets and Montagues. The play starts  with a feud between the noble families but the reason why they are enemies is not known. It  is the dispute between them that is covered in all the major events of the play. This  deep-rooted struggle between the families for generations is what leads to the tragic  deaths of the lovers - Romeo and Juliet from the two respective Houses. It is after  this that the families bury their enmity and mourn.  

in what passage i'm sorry but i don't see anything there.

b. cronkite, a trusted television personality, declared that the war was unwinnable and told the american people that the government had better find a way out

even though it went against everything the news anchors typically stood for, cronkite voiced an opinion and took a stance, telling the us that there was no way they were going to win, the war was going to end in a stalemate.