The researchers were most concerned about External events.
<h3><u>Explanation: </u></h3>
Quasi-experimental designs are different from true experimental designs. They resemble the experimental research but it is not the real one. There are various types of quasi-experiment design, one of the important designs is the pretest and posttest design which is discussed in the above scenario.
The most likely reason for the experimental effect is based on selection bias. Self-fulfilling Prophecy & Instrument Decay might be the potential cause of the internal validity that is linked with the experiment done by the staff.
Answer:
option D, A small group of people share power
Definition: a preliminary or preparatory statement; an introduction.
US Preamble: The Preamble of the United States Constitution, beginning with the words "We the people ", is a brief introductory statement of the Constitution's fundamental purposes and guiding principles.
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The shadow of Nixon presidency affected Carter's presidency because <span>the American public expected more from the President than he could possibly deliver. Americans seemed to want a strong and effective chief executive who was also open and democratic. However, these worthy values were not always compatible. </span>
