"It's . . . fine," Bella says to both of them. She pauses to tease out in detail exactly what she means by that, then adds,

"Of all the things I've heard today, it's by far the most agreeable."

Considering what else is on that list, the phrase damning with faint praise barely even begins to cover that remark, but without having had the benefit of thinking through her own feelings on the matter, it's also the most accurate conclusion she can offer for now.