The correct use of "however".

"However" is an adverb, and in its usage of introducing a statement contrasting with a previous one, placed between the 2 statements, as in:

A. The hunger declines after eating breakfast. However it may not be completely satisfied.

I have always made it the start of a new sentence.

However (sic), is it correct to use it as in:

B. The hunger declines after eating breakfast however it may not be completely satisfied?

(Of course one can also put "however" following the 2 statements, as in:

C. The hunger declines after eating breakfast - it may not be completely satisfied, however.

or

D. The hunger declines after eating breakfast. It may not be completely satisfied, however.)

Please advise, as I am checking a formal report.

Thanks,

Doug