The Gupta Empire is considered the "Golden Age" of ancient India PRIMARILY because it

Awas marked by achievements in science, mathematics, and the arts.
Bestablished the role of Buddhism as the central religion of India.
Cwas the first Indian civilization to unite most of the subcontinent.
Ddefeated the Romans in numerous battles over control of trade routes.

The correct answer is A. The Gupta Empire is considered the "Golden Age" of ancient India primarily because it was marked by achievements in science, mathematics, and the arts.

Explanation:

The Gupta Empire was one of the greatest political and military empires in the history of India. It was ruled by the Gupta dynasty between 320 and 550 AD and occupied most of northern India and present-day East Pakistan and Bangladesh. Under this empire, there was a period of peace and prosperity that favored the development of Indian culture from an artistic, literary and scientific point of view.

The Gupta kings established an effective administrative system and a strong central power, allowing local autonomy in periods of peace. The society was ordered according to the beliefs of Hinduism with a rigid division in castes. At this stage Hinduism acquires its main characteristics: the main divinities, religious practices and the importance of temples.

During this period, trade and foreign exchange were so great that Hindu and Buddhist mythology and architecture expanded through Borneo, Cambodia, Indonesia and Thailand.