Which action would most likely be part of a federal act to improve air quality in the United States? A) Raising taxes on companies that encourage employees to carpool
B) Encouraging the development and sale of alternative fuels
C) Lowering the average cost of gasoline per gallon
D) Encouraging citizens to use vehicles with diesel engines

Answer meranesia;

The answer is d. none  hope this .

The first immigrants to settle in what is now the united states were the ancient ancestors of modern native americans. the precise routes of those first north american immigrants are disputed, but there is no uncertainty about the fact that every human being on the continent is either a recent immigrant or a descendant of earlier immigrants. since the first immigrants came here from asia more than thirteen thousand years ago, there have been four large and easily recognizable modern waves of immigrants into the united states.