Circumstances such as sudden poverty, physical abuse (struck at least 3 times by their husband), overall neglect (husband is lazy), dishonor brought upon the woman's family, or if their husband settled in a new country and neglected to go to bed with them for 3 years. (source: https://en.natmus.dk/historical-knowledge/denmark/prehistoric-period-until-1050-ad/the-viking-age/th...)
(other source: http://www.viking.no/e/life/ewomen.htm)
These were some of the answers based on information online, but your teacher may be expecting other ones. In general, neglect or maltreatment/abuse would be grounds for a divorce.
Arnold Schwarz, hope it helps (:
it wont let me post the rest of the last name
A: it Encourage people to use the sea for food and trade!
