The most accurate response regarding the correlation between Roman expansion policy and trade in the Indian Ocean is:
As the Romans conquered territory, they gained access to trade resources, which encouraged more expansion.
This analysis reflects how Roman imperialism was often driven by economic motives, including the desire to control and facilitate trade routes. The expansion into new territories not only provided access to valuable goods but also secured trade networks that were vital for the economic stability of the Empire. Thus, each successive conquest could lead to greater commercial opportunities and resource accumulation, reinforcing a cycle of expansion.
While it's true that trade interests and the desire to protect them were significant factors influencing Roman expansion, the relationship wasn’t solely about protection or resources; it also had profound implications for the empires' economic growth and wealth accumulation.