You chose: Arabella should marry someone else
While in the novel Arabella ends up with Glanville, there were a number of other potential suitors she encounters throughout the novel. Any one of these men, or perhaps a new man found after her cure, could end up being her future spouse. With her newfound common sense, she might even be able to discern between well-intentioned men and men who are faking certain traits like Sir George and men who may have terrible intentions like the stranger in the carriage.