SUBJECT>The 17 minute bridge crossing POSTER>Koala EMAIL>@down.under DATE>March 18, 1997 at 13:00:46 EMAILNOTICES>no PREVIOUS> NEXT>1326 1338 LINKNAME> LINKURL>

OK, I give up. What is the answer? I could get as low as 19 minutes with:


A -- 10 min.
B -- 5
C -- 2
D -- 1


10 Min -- A & D cross
01 Min -- D returns
05 Min -- B & D cross
01 Min -- D returns
02 Min -- C & D cross
==
19 Min


The only way I can see to get rid of the extra two minutes is to throw the flashlight to the remaining two, but that results in 15 minutes, not 17 as stipulated. So what IS the answer?