According to the diathesis-stress model, mario's current stressful circumstances are not the only factor in whether or not he develops a mental disorder. which two factors could contribute to his diathesis, or vulnerability

I believe the answer is: genetic predisposition and childhood trauma

Genetic predisposition could affect the hormonal balance that could affect our response to stressful stimulus.
Childhood trauma could also make adults felt sudden anxiety on certain situations that remind them to the traumatic experience that felt during the childhood.