【单选题】

In this section, you will hear several passages. Listen to the passages carefully and then answer the questions that follow.

Questions 11 to 13 are based on the following passage.At the end of the passage, you will be given 15 seconds to answer the questions. Now, listen to the passage.
What development caused a decline in the use of railroadsA．The use of oversized freight containers.
B．Safety problems with railroad tracks.
C．The growth of the automotive industry.
D．The high cost of meeting environmental regulations.