Answer: Longitudinal study.
A longitudinal study is one that involves repeated observations of the same variables over a period of time (in the example, it was four years). The opposite type of study is a cross-sectional study (one that looks at the variables at a given moment).
Answer:
In most states of the U.S., the chief election officer is the secretary of state. In some states, local officials like a county registrar of voters or supervisor of elections manages the conduct of elections under the supervision of (or in coordination with) the chief election officer of the state.
Explanation:
Answer: B
Explanation: In 1950, television was a quite new thing. Computing systems were also in the beginning of its own industry and technology was finally at its earliest awake. To prove how fast technology was, in 1959, almost 90 percent of the people now owned televisions.
P
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