听力原文： The Western European Union, the defense organization linking most countries of

the European Community, is meeting in Luxembourg to discuss ways to reinforce economic sanctions against the Serbs by tightening controls on the River Danube. It is expected to approve of a proposal to send patrol boats manned by armed police and customs officers with power to search and turn back ships suspected of breaking the sanctions. International efforts to isolate Serbia have been undermined by ships carrying oil and other illegal supplies from the Black Sea region along the Danube into the former Yugoslavia after ignoring attempts by the local authorities to stop them. It is reported that most of the illegal traffic of goods is believed to be arriving in Serbia over land from Greece and former Yugoslavian Republic of Macedonian.

What is the purpose of the meeting in Luxembourg？

A．To control patrol boats on the River Danube.

B．To end economic sanctions against Serbia.

C．To step up economic sanctions against Serbia.

D．To send police officers to search the river.