One of the 10 computer manuals published by company T in 2005 was made for home computers. Exactly five of the advertisements released by company T featured those manuals written for home computers. Since 20 advertisements were released by company T in 2006, no more than one-quarter of them featured the computer manuals published by company T in 2005. Which one of the following, if true, allows the conclusion above to be properly drawn? ['None of the advertisements released by company T in 2006 featured computer manuals other than the ones written for home computers.', 'None of the graphics used in the advertisements released by company T in 2006 were done by professional artists.', 'Some of the advertisements released by company T in 2006 were actually redesigned versions of old advertisements.', 'None of the computer manuals published by company T in 2006 were based on technology gained from the home computer manuals published in 200']