Respuesta :
I think your best choice would be letter C, companionate. Hope that helps! ^_^
From the description given in the question it is clear that Ryan and Becky’s relationship, which starts as a platonic love when they were friends, to a passionate love when they were starting a relationship together, has now become a (C) companionate love, one that is commonly found in long-term relationships, where the passion is no longer there, but the deep affection for one another still lingers.