According to the lecture, what is the biggest advantage of living in a large empire in the Middle Ages? Group of answer choices There are lots of people (slaves) so no labor-saving technology is needed. There is a strong military, which will protect the Empire from invasions and a collapse. The economy is united, which means that the entire Empire can benefit from easy trade and have access to more products. There are lots of people (intellectuals), so labor-saving technology was often developed and improved