Based on the quoted statement "The management review shall be planned and carried out taking into consideration..." those elements shall be...
Right now the 2015 version is the current one, so it's logical that you work in that one. There are differences in version 2015 regarding 2008 but...
The occurrence is the element to consider in the ranking; the preventive preventive actions (as the offset) that are part of the process decrease...
Preventive actions will decrease the occurrence; so the most effective preventive actions get lower occurrences and decrease the occurrence rating...
Separate names with a comma.