For one additional degree of difficulty: What's the result from this query?

select DATEADD(HOUR,5,DATEADD(MINUTE,-59,'2009-02-09 12:34:56.789'))

a) 2009-02-09 07:34:57.789

b) 2009-02-09 16:35:56.789

c) 2009-02-09 16:33:56.790

d) 2009-02-09 16:35:56.790