This complication contributes to the central conflict of the play is:
When Romeo is forced to leave the city, his marriage to Juliet is strained.
After waiting with Fiar Laurance for the desition of the Prince which everybody thought would be death, he has to leave the city, event that leads to all the future tragedies in the story and ending with the death of both lovers.
The other options are not correct because all of them are events that don't occur in this story