This is an explanation question. The passage describes the various benefits of jets--their fuel efficiency, comfort, and ability to fly higher and faster than smaller planes--but then notes that turboprop planes are enjoying a resurgence. We're looking for a choice that resolves the apparent paradox.

(A) This choice addresses one of the benefits of jet travel, but it doesn't suggest why turboprop planes have overtaken jets despite the other clear advantages.
(B) This is correct. While it acknowledges the benefits of jet travel, it relates their very popularity with an increasing price that makes other alternatives more attractive.
(C) This is a common form of incorrect choice. Just because the same phenomenon is observed elsewhere does not explain why it is occurring as described in the passage.
(D) This is off-topic. It doesn't matter who owns the planes. We're looking for a choice that explains why jets are losing popularity despite several benefits.
(E) This choice suggests one cost of travel by jet, but it doesn't suggest that turboprop planes escape the same fate, nor does it confirm that the increase in cost is enough to offset the benefits of jet operation and travel.