Prime Minister Jos Manuel Duro Barroso resigns. He is to assume the presidency of the European Commission later in the year (the European Parliament approves him on July 22).
Can we infer the following?
Jos Manual Duro Barroso will be Prime Minister on July 23.

Options are:
(I) Yes.
(II) It's impossible to say.
(III) No.
The answer is:
(III)