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A - looks like a correct answer but you don't know what issue types you have in that project.
B - also looks correct but you don't know permissions set in that project so you can't be sure that all team members have the same rights
C - is correct - in simplified workflow you can transition issues from any status to any status. That is a fact about simplified workflows.
D - part correct - indeed when you are executing transition to Done Resolution field is set but when you are moving ticker from Done status - Resolution field is cleared (technically it is a setting field with empty value).
Thank you, @Sebastian Krzewiński for the detailed answers however can you elaborate more on the last option "D" because when testing i found it to be true why not selecting that option instead if C
As I mentioned - simplified workflow is any to any. You can go to Done status from any status. During moving to Done status resolution will be set (there will be triggered post function Update issue field). When you will move ticket from Done status to any other status - resolution will be cleared (same here - there will be triggered post function Update issue field). So in option D sentence is not true because resolution can be set more than once time. It will be set first time when you move ticket to Done but then you can change resolution by reopening issue or entering Done status again.
