<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>
Answer:
darn no one answered ... how sad
Explanation:
Explanation:
a. irrigation improvements
Answer:
A). It was an unusually violent strike.
Explanation:
The federal government became involved in the American Railway Union's strike against Pullman company as it was an unusually violent strike that could not be overlooked as it affected the freight badly. The federal government carries the right to intervene in labor disputes or strikes especially when it adopts a violent form. The Pullman strike badly affected the nation's freight. Thus, the federal government interfered to end this protest in order to get the things back to normal by ordering the army to control the strikers and when they(strikers that were obstructing the trains) refused to violate the judicial order, they were imprisoned. Thus, <u>option A</u> is the correct answer.
