In 476 AD, the Roman Empire had largely fallen apart, with the Western Roman Empire officially dissolving that year. However, there were still territories outside of the empire where Christianity was present. Among the options you provided, the most accurate response regarding areas with Christians outside the Roman Empire in 476 is:
Germany
At that time, while much of Europe was influenced by the remnants of the Roman Empire, regions like Germany had emerging Christian communities, despite being outside of formal Roman control.