Final answer:
The Ming Dynasty's architectural achievements include the reconstruction of the Great Wall and the building of the Forbidden City, showcasing the empire's power and architectural sophistication.
Step-by-step explanation:
The Ming Dynasty is renowned for its monumental architectural undertakings. Among these, the reconstruction of the Great Wall and the establishment of the Forbidden City in Beijing stand out as significant achievements. The Great Wall's enhancements during the Ming era chiefly aimed to protect the empire from northern invasions. Meanwhile, the construction of the Forbidden City, which commenced under the reign of Yongle Emperor, not only served as the imperial palace but also showcased the dynasty's wealth, power, and architectural sophistication.
Although the Grand Canal was completed by the Sui Dynasty prior to the Ming Dynasty, it was used significantly during the Ming era and typified the grand ambitions of the previous Sui emperors. This helps us appreciate the scope and continued importance of infrastructure projects in Imperial China. However, the Grand Canal is not attributed to the Ming Dynasty's construction efforts. The Angkor Wat, another grand construction, was a project of the Khmer Empire and therefore not related to Chinese dynastic achievements.
Therefore, the correct answer to which of the following is the building achievement(s) of the Ming Dynasty is B. Reconstruction of the Great Wall and the building of the Forbidden City.