They used simple every day words.
The Anglo-Saxon words were seen as the words of the common people. They named things that people used and talked about every day. They were not used for philosophical discussions or in the government. Words with Latin roots were seen as more intelligent because only a specific group could read and understand them, so Latin and French were seen as more complex. The last answer choice is a complete throw away. "Just better" indicates that this is an answer choice of personal opinion, just thrown in so that there is a fourth choice.