Usually, the beam will fail in the region adjacent to one of the loads. However, if the beam is elastic enough, it may fail in the middle region. In this particular case, the end condition is set to fail. Left end more than right end.
Minnemooseus, in message 5, writes:
Assuming the beam was rigidly fixed at A and able to move on roller at D, I think the greatest stress would be at A - The beam would fail at A (the support/beam connection at A would fail).
You never replied to my
message 5.
Moose