D. contain relevant information
Authoritative sources are works known to be reliable and highly trusted because its authenticity is extensively recognized by experts. Once your source is reliable, the information you need is certainly relevant to your study.
Authoritative sources could be up to date and have thoughtful opinions, however, any sources could have this too.
Any articles are easy to find simply by using the internet. But the question is, are they reliable?
To live in Quebec is to become accustomed to daily reminders that French in the Canadian province is the most regulated language in the world. Try, as I did recently, to shop at Anthropologie online and you’ll come up empty-handed.
Yeah I think you're correct there
Paper and printing. Also the compass was a development from the Tang Dynasty as well
