Concept:The word "effusive" means expressing feelings such as praise or gratitude openly, enthusiastically, and without restraint.
Explanation:In the given sentence, "effusive" describes the manner in which she offered her praise—with strong, overflowing emotion.
Option B is incorrect because "dispassionate" means unemotional or impartial, which is the opposite of "effusive".
Option C is incorrect because "tranquil appraisal" refers to a calm and composed evaluation, which contradicts the energetic nature of the word.
Option D is incorrect because "soothing and encouraging" describes the effect of the praise, not the way it was expressed.
Hence, Option A is the best fit, as it combines both the act of expressing approval and the exhibition of strong feelings.
Answer:A. expressing approval while exhibiting strong feelings