The financial community of Washington, DC has been expanding, largely as a result of which of the following?
1) increasing federal spending and subsidies for communities
2) pension and retirement accounts
3) taxation and the need for more tax accountants
4) controls and regulations
5) taxation and the need for more IRS agents
6) lending to businesses that have the bulk of their operations in the city
7) lending to businesses that have their national headquarters in the District