听力原文： The new US Trade Representative said today that the US will reactivate its complaint against European' subsidies for the aircraft maker Airbus. Both the US and the European Union had filed complaints with the World Trade Organization accusing each other of subsidizing aircraft companies. The US said the European governments were providing cheap loans to help Airbus develop new aircraft. The EU said that the US subsidizes the Boeing Company by giving it government contracts and Washington State tax breaks. Both sides had agreed to suspend their cases in January while they tried to find a negotiated settlement. Today Trade Representative Rob Portman said the EU has continued its cheap loans to Airbus forcing the US to go back to the WTO.
What's the main idea of the news？

A. The EU government provides cheap loans to help Airbus develop new aircraft.
B. The US government subsidizes the Boeing Company by giving it government contracts.
C. The Eli and the US try to find a negotiated settlement on trade war.
D. US make a new complaint against EU subsidies for the aircraft maker Airbus.