<s>[INST] The next text is a question of a member of the European parliament:"Even today within the single market, EU consumers buying from the same manufacturers do not have access to goods of the same quality.   Ihave been contacted by one of my constituents in the Czech Republic who wanted to buy a new car, an Audi Q7. One of this constituent’s requirements was that he should be able to control some of the car’s features and functions through an app on his mobile phone.   He was told, however, that vehicles produced for the Czech market were fitted with a different control unit from those produced for the German one, and so they could not be controlled with the mobile phone app. If he wanted to be able to use the app in the Czech Republic, then he would have to buy the car in Germany. Later, when he was buying the car in Germany, my constituent was told that the manufacturer, AudiAG, tried to use maximum-performance control units that were better than the ones used for other markets, and that this was because of the emissions scandal.   The single market is still dominated by invisible barriers in the form of separate national markets. Consumers should have access to the very best that Member States have to offer, but at present, their access is restricted by national frontiers.   Is the Commission monitoring this problem, and is it planning to take action? Do practices such as this not infringe consumer rights and violate the principle of the single internal market?"
Analyze carefully the text and assign it to the most relevant policy area among those listed below. Do not explain your answer and return only a number.
Policy area numbers: 1 = Macroeconomics
2 = Civil Rights, Minority Issues and Civil Liberties
3 = Health
4 = Agriculture and Fisheries
5 = Labour, employment and pensions
6 = Education
7 = Environment
8 = Energy
9 = Immigration
10 = Transportation
12 = Law and Crime
13 = Social welfare
14 = Regional and Urban issues and Planning
15 = Banking, finance and domestic commerce issues
16 = Defence
17 = Space, science, technology, and communications issues
18 = Foreign trade
19 = International affairs and foreign aid
20 = Governance and government
21 = Public Lands, Water Management and Territorial Issues
23 = Culture and media
[/INST]. Answer = [15]. </s>
Even today within the single market, EU consumers buying from the same manufacturers do not have access to goods of the same quality.   Ihave been contacted by one of my constituents in the Czech Republic who wanted to buy a new car, an Audi Q7. One of this constituent’s requirements was that he should be able to control some of the car’s features and functions through an app on his mobile phone.   He was told, however, that vehicles produced for the Czech market were fitted with a different control unit from those produced for the German one, and so they could not be controlled with the mobile phone app. If he wanted to be able to use the app in the Czech Republic, then he would have to buy the car in Germany. Later, when he was buying the car in Germany, my constituent was told that the manufacturer, AudiAG, tried to use maximum-performance control units that were better than the ones used for other markets, and that this was because of the emissions scandal.   The single market is still dominated by invisible barriers in the form of separate national markets. Consumers should have access to the very best that Member States have to offer, but at present, their access is restricted by national frontiers.   Is the Commission monitoring this problem, and is it planning to take action? Do practices such as this not infringe consumer rights and violate the principle of the single internal market?