The fourth option is the correct answer.
This: "Super grand total of all the measures for all the dimension at all level"
makes absolutely no sense since not only can measures have different formats they can have different methods of calculation (last non empty, average of children, distinct count etc.). This query will always result in either the default measure or (if it's not defined) the first measure defined in the XMLA of the cube aggregated over the All member of each dimension which is irrelevant in this case but worth mentioning for completeness.
Additionally, I have never seen the term "Super grand total" used in any SSAS documentation. A quick google search reveals this question as the only full hit. Is this a term you have made up? If not, can you cite your source?