(D) Some telephone companies own cable companies in areas other than those in which they provide telephone services.

　　(E) The new fiber-optic services offered by telephone companies will be subject to more stringent governmental programming regulations than those to which cable companies are now subject.

　　12. The only physical factor preventing a human journey to Mars has been weight. Carrying enough fuel to propel a conventional spacecraft to Mars and back would make even the lightest craft too heavy to be launched from Earth. A device has recently been invented, however, that allows an otherwise conventional spacecraft to refill the craft's fuel tanks with fuel manufactured from the Martian atmosphere for the return trip. Therefore, it is possible for people to go to Mars in a spacecraft that carries this device and then return.

　　Which one of the following is an assumption on which the argument depends?

　　(A) The amount of fuel needed for a spacecraft to return from Mars is the same as the amount of fuel needed to travel from Earth to Mars.

　　(B) The fuel manufactured from the Martian atmosphere would not differ in composition from the fuel used to travel to Mars.

　　(C) The device for manufacturing fuel from the Martian atmosphere would not take up any of the spaceship crew's living space.

　　(D) A conventional spacecraft equipped with the device would not be appreciably more expensive to construct than current spacecraft typically are.

　　(E) The device for manufacturing fuel for the return to Earth weighs less than the tanks of fuel that a conventional spacecraft would otherwise need to carry from Earth for the return trip.

　　13. In 1712 the government of Country Y appointed a censor to prohibit the publication of any book critical of Country Y's government; all new books legally published in the country after 1712 were approved by a censor. Under the first censor, one half of the book manus submitted to the censor were not approved for publication. Under the next censor, only one quarter of the book manus submitted were not approved, but the number of book manus that were approved was the same under both censors. If the statements in the passage are true, which one of the following can be properly concluded from them?

　　(A) More books critical of Country Y's governments were published before the appointment of the first censor than after it.

　　(B) The first censor and the second censor prohibited the publication of the same number of book manus.

　　(C) More book manus were submitted for approval to the first censor than to the second.

　　(D) The second censor allowed some book manus to the published that the first censor would have considered critical of Country Y's government.

　　(E) The number of writers who wrote unpublished manus was greater und

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