Final answer:
Emperor Hadrian (option D) is credited with rebuilding the Pantheon in Rome after it was destroyed by fire, completing it between 125 and 128 CE.
Step-by-step explanation:
The emperor who rebuilt the Pantheon in Rome after it was destroyed by fire was Hadrian. Though the initial rebuilding process was started under Emperor Trajan after the fire of 110 CE, it was Hadrian who completed the construction and reconceived the Pantheon into the impressive structure we recognize today, somewhere between 125 and 128 CE. Hadrian was known for his extensive building projects throughout the Roman Empire, including Hadrian's Wall in Roman Britain and the Temple of Venus and Roma in addition to the Pantheon. Despite some recent rethinkings of the Pantheon's date and authorship, Hadrian is credited with the reconstruction of the Pantheon that stands today, marking it as a significant architectural achievement of his reign.