Wikipedia

a. What is Wikipedia? 

"'Wikipedia is a multilingual, Web-based encyclopedia project, operated by the Wikimedia Foundation, a nonprofit organization.'"
b. How would you answer the question posed in this piece “How reliable can a source be when anyone can edit it?”

If it can be edited it can be changed to be inaccurate but by checking the sources posted, you can check to see if they are correct. 
c. Who do the creators of Wikipedia place their trust in when it comes to weeding out misinformation? 

They believe in "wisdom of crowds". 
d. Why did founder Larry Sanger leave Wikipedia? 

"Mr. Sanger left Wikipedia, believing that it should give more authority to experts; he has since created another site, Citizendium that does just that."
e. What would abuse or vandalism look like on a Wikipedia page? 

Giving misleading information about a certain entry.
f. What do the statistics quoted in the third paragraph of this piece reveal? 

They reveal that almost everyone that uses the internet has been to or used Wikipedia. 
g. Why do you think Wikipedia is so successful? 

I think it is successful because it has information about anything and everything.
h. Why might Wikipedia’s creators not want to accept advertising? 

With a lot of advertising it could make people less likely to go to their site if it had all the annoying adds.
i. How does Wikiscanner help increase the reliability of Wikipedia entries?

"Wikiscanner, quickly exposed examples of self-interested editing by prominent businesses and governments around the world."