Actually, the A athletes don't have to finish the race.
They can go to the semis or prelims to find qualifiers like they did in 2004 when Robison did not make it out of the semis in the 1500.
Now here's a question, speaking of 2004.
What if Ritz DNFed the 10,000 like Kennedy did.
They had 5 A qualifiers but Meb declined his spot and took his marathon spot.
Abdi and Dan Browne, placing 2nd and 3rd, took two spots.
Ritz finished last while hobbling and was given the third spot when Meb deferred.
What if Ritz dropped out? Who would have gotten the third spot, Ritz or Kennedy?