Which of the Following Statements Regarding Automobile Pollution Is True

question 9

Multiple Choice

Which of the following statements regarding automobile pollution is true?

• A)If states do not adopt their own set of automobile pollution standards, they must abide by those of the federal government.
• B)California and New York are the only two states with separate automobile pollution standards.
• C)States have the right to adopt California standards instead of federal rules.
• D)Because of federal standards, motor vehicles are no longer a major source of air pollution.

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Definitions:

Independent Variable

The variable in an experiment that is manipulated or changed by the researcher to observe its effect on the dependent variable.

Dependent Variable

In an experiment, the variable being tested and measured, expected to change due to the influence of the independent variable.

Control Group

In an experiment, this group does not receive the treatment under investigation and is used as a benchmark to measure how the other tested groups compare.

Independent Variable

In experimental research, the variable that is manipulated or changed by the researcher to observe its effects on the dependent variable.