The three true statements about the Iditarod race are:
A. The "mushers" who compete in the race can be men or women. D. The race was run informally before it became official. E. The race ends in Nome each year.
Statements B and C are not true; the race duration can vary year to year, and while the race has a standard length (approximately 1,000 miles), specific checkpoint locations can sometimes change.