Several airlines have recently intensified their fierce competition for business by offering tickets, that if purchased 2 days in advance, cost as much as 40% less than the heretofore lowest-priced "super-saver" tickets, which require a 30day advance purchase. The airline's long-term gains from tickets bought under this new plan will be enourmous bc unlike earlier discount tickets, these are not refundable. The author assumes which of the following about discounted airline tickets in predicting long-term gains in airline revenue?
A. More discounted, advance purchase tickets are purchased than are actually used.
B. Tickets requring 30day advance purchase are not profitable for airlines.
C.Few business travelers have taken advance of 30day advance purchase tickets
D. Airlines will have to discontinue offering 30day advance purchase tickets when they begin offering 2-day advance purchase tickets.
E. The majority of the 2 day advance purchase tickets offered by a given airline will be sold to passengers who have not previous flown on that airline.
(I thought the answer was B, but its A)
The mastodon, a large mammal resembling today's elephant, became extinct at the end of the Ice Age. Scientists once attributed the mastodon's extinction to the disappearance of overgreen forests at the end of the ice Age. More recently, however, scientists have rejected that theory, hypothesizing isntead that the mastodon's extinction was caused by the draining of glacial wetlands.
Which of the following, if recently discovered, would help to account for the change in the accepted explanation of the mastodon's extinction?
A. When the Ice Age ended, many forests died off, endangering the food supply for herbivores that fed primarily on evergreens.
B. As glaciers reced at the end of the Ice Age, glacial wetlands drained, leaving a new topography of hills and plains.
C. Bacteria found in mastodon remains are similar to backteria found in the remains of species that are known to have fed on evergreens.
D. The mastodon's diet consisted primarily of water plants such as marsh grasses and water lilies.
E. Evergreen forests were inhabited by many species of large mammals until the end of the Ice Age.
(I thought the answer was A, but its D..I don't know if I misread the correct answer, but i'm not really sure why its D!)
A. More discounted, advance purchase tickets are purchased than are actually used.
B. Tickets requring 30day advance purchase are not profitable for airlines.
C.Few business travelers have taken advance of 30day advance purchase tickets
D. Airlines will have to discontinue offering 30day advance purchase tickets when they begin offering 2-day advance purchase tickets.
E. The majority of the 2 day advance purchase tickets offered by a given airline will be sold to passengers who have not previous flown on that airline.
(I thought the answer was B, but its A)
The mastodon, a large mammal resembling today's elephant, became extinct at the end of the Ice Age. Scientists once attributed the mastodon's extinction to the disappearance of overgreen forests at the end of the ice Age. More recently, however, scientists have rejected that theory, hypothesizing isntead that the mastodon's extinction was caused by the draining of glacial wetlands.
Which of the following, if recently discovered, would help to account for the change in the accepted explanation of the mastodon's extinction?
A. When the Ice Age ended, many forests died off, endangering the food supply for herbivores that fed primarily on evergreens.
B. As glaciers reced at the end of the Ice Age, glacial wetlands drained, leaving a new topography of hills and plains.
C. Bacteria found in mastodon remains are similar to backteria found in the remains of species that are known to have fed on evergreens.
D. The mastodon's diet consisted primarily of water plants such as marsh grasses and water lilies.
E. Evergreen forests were inhabited by many species of large mammals until the end of the Ice Age.
(I thought the answer was A, but its D..I don't know if I misread the correct answer, but i'm not really sure why its D!)
