Problem: How to clean quartz<br>Rinse the quartz off with a power washer. If you have a large amount of quartz with a heavy amount of mud or dirt on it, you can try to rinse it off with a power washer. Set your quartz on the ground (preferably on concrete or asphalt) and rinse off the dirt.

Based on the paragraph above can we conclude that "Quarts cleans better with a combination of high surfactant cleaner and a power washer used outdoors. "?

A: It's impossible to say


Problem: Shelby Foote, author of the acclaimed three volume history of the American Civil War, The Civil War: A Narrative, died in Memphis on June 27 at age 88. Foote also wrote historical fiction, including Follow Me Down and Shiloh. He may be best known for his appearance in filmmaker Ken Burns' PBS documentary, The Civil War. The Modern Library ranked Foote's The Civil War: A Narrative as number 15 on its list of 100 best non-fiction books. He was commissioned to write a short history of the Civil War by Random House and spent more than 20 years on the work eventually producing the three volumes.

Based on the paragraph above can we conclude that "Shelby Foote was never commissioned to write a book"?

A: No


Problem: The current Prime Minister Stephen Harper supported Mulroney's right to comment on Trudeau, "I think it's well known Mr. Mulroney was an opponent of Mr. Trudeau," Harper said. "He was his opposition leader and, as you know, came to power at the end of the Trudeau period when people wanted to make a change. I'll leave it to people who were there then to fight those battles. I think it's perfectly reasonable that they would comment. I think these are debates that are best left to some of the people who were around then and academics." Trudeau's former piers and friends have rallied behind his legacy and made public comments to dampen Mulroney's accusations.

Based on the paragraph above can we conclude that "Mr. Harper was the opposition leader at the end of the Trudeau period"?

A: