Which of the following is a good question to ask yourself when evaluating an online source? is the author famous and well-known? how recently was this website published? how many people have visited this site? is this site easy to navigate?

How recently was this website published?

Explanation:

When evaluation an online source, one of the most important things to ask yourself would be how recently was the website published, in that way you can know if the information is recent and dated, or of it is old and outdated and it wouldn´t help you to continue eny further with your investigation using that information.

c. a group of tribes that formed a confederacy

given the fact that the question is about the detail that best support the idea that oppressive leaders use   propaganda to achieve thir goals,   the first option does not refer to any kind of propaganda, since it only tells about that the milk and the windfall apple should be reserved for the pigs. in the second option, that is, "snowball and napoleon sent out flights of pigeons whose instructions were to mingle with the animals on the neighbouring farms, tell them the story of the rebellion, and teach them the tune of "beasts of england". it can be identified that the oppressors make use of the propaganda, which is represented by the pigeons, and the information they have to tell other animals about what was happening in the farm in order to get their objectives. for that reason, the right answer is the second option, taking into account that the third option do not refer to propaganda since it only talks about that they did not want jones back. and, finally, the last option refers to the result of the given news, but it does not mean about the propaganda they used to achieve their goals.