单项选择题
Questions 11 to 13 are based on the following news report about challenges facing Australia’s agriculture sector. You now have 15 seconds to read Questions 11 to 13.
What is happening in Australia’s agricultural industry（）
A．Many people are disqualified.
B．Few senior positions are offered.
C．Aging staff is posing a threat to its future.
D．Senior staff leave for overseas employment.