<span>because the astronomers can measure the time</span>
Answer: <em>Option (C) is correct.</em>
Trial and error are known as one of the methods of problem-solving. It is represented by recurrent, different attempts which continue until progress, or until the individual stops. This is also known as a heuristic approach to problem-solving or obtaining knowledge. This method is used in several disciplines such as computer science, elementary mathematics etc.
Answer:
To deter and punish terrorist acts around the US
Explanation:
Answer:
Longitudinal research
Explanation:
Longitudinal research is also called an observational study method. In this research, the data is gathered on the same population over some time. Longitudinal study as the name indicated run for a long-time period or a decade. In this study, the same individual is observed for a long period.
For instance, a study was conducted on aging in which around five thousand people were part of the study between the age of 45 to 85 for 20 years,
Thus Dr. Edward used a longitudinal study to conduct his research.
