The correct answers are resolutiondate >= startOfMonth("+9d"), resolutiondate > startOfMonth(9d), and resolutiondate > startOfMonth("+9d").

The function startOfMonth with a "+9d" offset returns the instant at the start of the tenth day of the current month. Using resolutiondate >= startOfMonth("+9d") therefore includes that instant and any later timestamps and so returns issues resolved on or after the tenth.

Both resolutiondate > startOfMonth(9d) and resolutiondate > startOfMonth("+9d") refer to the same offset in practice and are accepted forms. Using the greater than operator with that offset will return issues resolved after the midnight instant that startOfMonth returns and that covers resolutions occurring on the tenth day in normal timestamp scenarios.

The expression resolutiondate > startOfMonth("+8d") is incorrect because startOfMonth with a "+8d" offset begins at the ninth day. That query would include issues resolved on the ninth day and so it is too early for the requirement.

The expression resolutiondate = startOfMonth(9d) is incorrect because the equals operator matches a single instant. That will rarely match real resolution timestamps and it does not mean on or after the tenth day.

The expression resolutiondate > startOfMonth("9d") is incorrect because the quoted form without a leading plus is not the intended offset syntax here. It will not behave as the valid startOfMonth("+9d") or unquoted startOfMonth(9d) forms and so it does not reliably return issues from the tenth day onward.

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