【单选题】

Questions 14 to 17 are based on the following passage.At the end of the passage, you will be given 20 seconds to answer the questions. Now, listen to the passage. Which of the following details is NOT true according to the passage

A、Ben wants to visit Mongolia when the weather is warm.
Ben considers the travel expense reasonable.
C．The trip today is expensive considering inflation.
D．Ben was unable to travel to Mongolia in 1971.