<span>
Homo Ergaster and Homo Habilis
</span>
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?
