The correct answer is D)macadam. Macadam was an invention keyed by a Scottish man who changed the way we view paving of roads and highways. Macadam is a mixture of small stones crushed together with asphalt, the sticky, black material used for both concrete and macadam. The name Macadam comes from the engineer's name, which was John Loudon McAdam. There had been other attempts at macadam before McAdam, but McAdam improved it and his was the first to arrive in the United States.
The correct answer is letter A
Unlike most presidents, Johnson has a distant background in the aristocracy. He owned a tailoring shop in the state of Tennessee, the "volunteering state".
In local debates, he defended the common man and attacked the plantation aristocracy. In the 1840s and 1850s, as a member of the House and Senate, he defended a bill to provide free land to the poor.
Johnson remained in the Senate even when Tennessee, along with the other southern states, joined the secession. The decision made him popular in the northern United States, as Johnson was showing himself to be in favor of the Union, not of the break-up of the United States.
A product is commodity when it is fungible. Commodities are raw materials like corn, wheat, copper, crude oil, etc.
