Which is one example of an effective research question ?

be specific and use detail make sure that the person reading has a complete understanding of what you're trying to say

Explanation:

For example: if you're talking about the effect of social media break it up into parts and don't bunch them all up. try saying "What effect does daily use of Twitter have on the attention span of under-16s?" and don't say "What effect does social media have on people’s minds?"

Hope this helps! :)

b. failure at least that one seems the most negative out of all of the answers provided pls correct me if i'm wrong. : ))

c. a group of tribes that formed a confederacy