Answer:
Nile was natural highway for Egyptian boats to go to other countries for trading
By measuring the Galvanic skin response, Dr. Laub is trying to avoid the problem of:
<h3>What are demand characteristics?</h3>
Demand characteristics are a form of behavior that participants in a research work exhibit. If they are able to fathom the cues in the research, they often tend to change the way that they behave.
If they change the way they behave, accurate results will not be obtained. So, this issue must be avoided at all costs and that is why Dr. Laub measures the Galvanic skin response.
Learn more about demand characteristics here:
brainly.com/question/17188674
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I recommend google it's very cool thing called a search engine.
Because the united states was going thriugh a war and spain took over alot of countries and gained there power
