What was the primary function of the Roman Forum?

What was the primary function of the Roman Forum?
A、It served as a marketplace for goods and services.
B、It was the location for gladiatorial contests.
C、It was used exclusively for religious ceremonies.
D、It was the center of political, social, and economic life in ancient Rome.
【正确答案】：D
【题目解析】：It was the center of political, social, and economic life in ancient Rome.