Final answer:
The best meaning of the sentence "An entire constellation rose in my heart" is that the narrator is beaming with pride and joy in response to Miss Crosman's compliment.
Step-by-step explanation:
The phrase "An entire constellation rose in my heart" from the passage in "The White Umbrella" suggests a profound feeling of elation and pride. When Miss Crosman mentions that something was "wonderful," the narrator's emotional response is likened to a gorgeous and expansive constellation, which symbolizes that the narrator is filled with a sense of joy and accomplishment. Therefore, the best meaning of that metaphorical sentence is that the narrator is beaming with pride and joy (Option C).