Final answer:
Zhu Zanji may have ended the voyages of Zheng He due to a spirit of isolationism and to save money on the expensive voyages. The correct answer is option d. A and B, as historical records from the era do not support French competition as a factor.
Step-by-step explanation:
The decision by Zhu Zanji to end the voyages of Zheng He is a question embedded in historical context and analysis within the study of the Ming Dynasty. According to the provided materials, one possible reason for the cessation of these voyages includes a combination of:
- A spirit of isolationism in the Chinese court under Zhu Zanji.
- The desire to save money and avoid the expense of the voyages.
The option suggesting competition with the French entering the Indian Ocean trade is not plausible, as the French were not a maritime power in the Indian Ocean during the early 15th century when Zheng He's voyages took place. Therefore, the correct answer to the question would be d. A and B.