Which of the Following Is True of CFCs

question 54

Multiple Choice

Which of the following is true of CFCs?

• A) They are now the most dominant gases in the stratosphere.
• B) They are now banned by international treaty.
• C) They are not able to exist for long in the atmosphere.
• D) They have disappeared in the atmosphere.
• E) They are very toxic to humans.

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Definitions:

Internal Validity

The extent to which a study can demonstrate that a causal relationship exists between two variables, free from the influence of extraneous variables.

Single-Case Experimental Designs

Research methods that focus on obtaining detailed information from individual participants to assess the impacts of interventions.

Interventions

Actions or processes of intervening, designed to improve health or alter the course of a disease, typically referring to treatments, therapies, or programs.