Modify the system field Fix Versions is correct because the Resolve Issues project permission allows users to change the fix version assignments when they perform resolve transitions or update an issue as part of closing work.

The Fix Versions field is a system field that records the target release or releases for an issue and changing it is commonly part of resolving an issue. Granting Resolve Issues permits users to perform the resolve action and to modify that field on the transition screens or via the workflow as configured.

Alter the system field Due Date is incorrect because editing the due date is not specifically granted by the Resolve Issues permission. Changing due dates is typically controlled by edit permissions and by which fields appear on the screens used for a transition.

Edit the system field Resolution is incorrect because although resolution values are applied when issues are resolved the Resolution field is normally managed by workflow transitions and post functions rather than being an explicit grant of the Resolve Issues permission alone in many configurations.

Update the custom field Resolution Reason is incorrect because custom fields are governed by screen and field configuration and by general edit permissions. Updating a custom field depends on those configurations rather than being uniquely enabled by the Resolve Issues permission.

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