Answer:
Phase 1
Step-by-step explanation:
According to Hans Selye, the stage that Dahlia most likely is in, would be Phase 1. I believe it is phase one because, in phase 1, the immune system slowly begins to crumble, and get worse. This is all due to stress. And given the facts of why Dahlia might be stressed, that just confirms, that she is having headaches because of those issues.
I really hope this helped!