<span>Experiments in which all variables are identical except for one are called controlled experiments. This where an observer tests his hypothesis by looking on changes that were brought about by one variable. The results are always dependent on one adjusted variable.</span>
It is in democracies that multiple political parties are most common, since democracy increase the chances that people with different opinions will be heard.
Eating seafood twice a week decreases the risk of heart stroke
I already took the test its D.
Answer:
d. All of the above
Explanation:
The United States is the originator and primary example of the presidential system, a model that is followed in only a few other democracies, such as Argentina, Brazil, Mexico, and the Philippines.
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