The image shows a close-up photograph of a structure, called a finial, atop the main dome of the Taj Mahal. The structure includes a lotus bud and a crescent moon with tips pointing heavenward. Use the photograph to answer the following question:

Public Domain

The crescent moon in the finial at the top of the Taj Mahal is evidence of what architectural influence?

choices:
Roman architecture
Greek architecture
Islamic architecture
Early Christian architecture