Question

17
rome unified its large empire using common language, currency, and
adopting ideas from conquered people
promoting hinduism
trade with china
engineering feats like roads and aqueducts

Explanation:

Rome unified its empire through shared systems and infrastructure. Hinduism is tied to South Asia, not Rome; trade with China was not a unifying internal tool; adopting conquered ideas was secondary to core unifying infrastructure. Rome's roads and aqueducts connected regions, enabling governance, trade, and cultural cohesion alongside language and currency.

Answer:

Engineering feats like roads and aqueducts