Option 1 -> "Addressed" requires an object (addressed someone) and is too formal for this emotional statement.
Option 2 -> "Exclaimed" means to cry out suddenly with strong emotion, perfectly matching the enthusiastic tone of the statement.
Option 3 -> "Imagined" refers to thinking or visualizing something, not suitable for introducing direct speech.
Option 4 -> "Described" means to give an account of something, which doesn't fit an emotional outburst in quotation marks.
Hence, Option 2: exclaimed -> The sentence shows Alice expressing joy and gratitude with strong emotion, which is exactly what "exclaim" conveys when introducing enthusiastic or emotional direct speech -> correct