Final answer:
The word 'sprang' suggests a sudden, energetic action by Dr. Takamine, most likely expressing positive emotions such as joy, making answer B the most appropriate option.
Step-by-step explanation:
The word "sprang" in the sentence, "Mukojima!" exclaimed Dr. Takamine as he sprang from the carriage," impacts the meaning of the excerpt by indicating the urgency or suddenness of Dr. Takamine's action. Option A is incorrect because there is no context to suggest the material in the carriage caused a bounce. Option B seems the most fitting, as the word "exclaimed" paired with "sprang" suggests a positive, energetic reaction, possibly to something exciting or joyful like seeing cherry trees, corresponding with the provided clues. Option C is unlikely because the word "sprang," while energetic, does not inherently convey anger. Option D is the opposite of what "sprang" implies, as it suggests a more cautious or deliberate exit, which doesn't align with the suddenness of "sprang." Therefore, the correct answer is B: It conveys Dr. Takamine's joy when he sees the cherry trees.