We set our alarm clocks, preparing for the swim meet, for 5:00 a.m.
A)
Preparing for the swim meet, we set our alarm clocks for 5:00 a.m.
Preparing for the swim meet we set our alarm clocks, for 5:00 a.m.
We set our alarm clocks preparing for the swim meet, for 5:00 am.
D)
For 5:00 a.m. we were preparing, to set our alarm clocks for the swim meet.