I would personally either say that her eyes grew wide for a moment creates an exciting mood because people pupils usually grow when they see something you are attracted to so this tells us that the thing she is seeing isn’t dull but rather exciting and something that is likeable or I’d say B because when you think of silence it is usually something that makes you feel kind of peaceful in a way and when you are in a restful mood you aren’t being aggravated or anything, you are still and calm and frosty is linked with winter and winter is a time when you are all relaxed and resting like then animals hibernating Hope this helped
