“However” and the use of punctuation

Here is an example of a sentence that has my finger-tips instinctively itching to type a modification:

A.

“Due to time constraints it was not possible to rank the identified hazards however time was set aside to review the output from the workshop.”

When I see this, I do something like this:



B.

“Due to time constraints it was not possible to rank the identified hazards; however, time was set aside to review the output from the workshop.”

Or this:

C.

“Due to time constraints it was not possible to rank the identified hazards. However, time was set aside to review the output from the workshop.”

I think that the comma after “however” flows better. But my main feeling here is that “however” in example A looks orphaned without a preceding full stop or semi-colon.

Is my angst unfounded?

Doug