An issue’s political impact and importance are commonly referred to as its

How would you characterize President Obama's presidency? Would you call him a successful or a disappointing president? Justify your answer with details from the text. Summarize your opinion and rationale

Answer:

Newsworthy events that have to do with the focus of an experiment and major disasters to which subjects are exposed are examples of ______.

A. history effect B. maturation C. instrumentation D. regression effect