Answer:
The main threat to internal validity here is History.
Explanation:
Internal validity refers to how well a research is conducted. Internal validity determines if it's the independent variable (or another factor) that caused or resulted in the change in the dependent variable.
History here alludes to the internal validity threat that refers to events outside of the experimental setting (increase in cigarette taxes) that may affect the dependent variable (smoking cessation).
The answer is: state governments
When the immigrants come into united states, they will settle on the states and will most likely have to settle to find a job in that states.
Because of this, the number of employment in that states could be threaten if the increase in the amount of workers far surpassed the increase in the amount of job opportunities. The state government would be the one that is responsible to bear such challenge.
<span>The courageous mother of Emmett Till allowed photographs of her son's mutilated body to be published in an act to let the world see what was done to her boy. these images were very important to the start of the civil rights movement.</span>
Answer:
<em>A storm is a violent meteorological phenomena in which there is heavy rain, and wind due to moisture in the air</em><em>.</em><em> </em>
Explanation:
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