In the United States, what percentage of smog comes from manufacturing sites?

Home Depot sells new and used doors to contractors who build new homes. Home Depot also sells new and used doors to homeowners. Which of the following would be counted in GDP?

A) the sale of a new door to TapKon construction for installation into a new home B) the sale of a used door to a homeowner C) the sale of a new door to homeowner D) the sale of a used door to TapKon construction for installation into a new home

The Constitution of the United States grants ________ the authority to regulate commerce and to impose tariffs

A) Congress B) the President C) the Supreme Court D) the U.S. Trade Representative