11.   The reader can Decide which of the possible explanations is the most plausible.

12.   There are several possible explanations for a link between interferon alfa and fatal hepatic injury.

13.   There are various possible explanations for climate change.

14.   There can only be one possible explanation.

15.   There seem to be only two possible explanations.

16.   Three possible explanations can be advanced.

17.   Three possible explanations come to mind.

18.   To some it might seem a possible explanation.

19.   Unfortunately, since there are so many possible explanations, the correct one is most difficult to ascertain.