Which sentences from the passage develop the central idea that prices vary over time as well as from place to place? Select each correct answer.

“as more people gain Internet access they’re researching items prices in other countries.”

“The same brand of bottled water you buy at home may cost twice as much in New York City.”

“Slowly but surely, the demand for cheaper garden hose is spreading throughout Germany , and the phrase “getting hosed” no longer has two meanings.”

“People in Germany just think a garden hose is worth more than do people in the United States.”

“Even with different tax cost, however, sometimes the difference in price between two places is hard to explain.”