I think you mean the Umayyad Caliphate and your question is from which country to which country this empire streched at the time (correct me if I'm wrong!)
So, their conquest of Spain hasn't started till 711 on the West, their land streched to today's Morocco.
In the east, they have reached the north of India, what is today mostly in Pakistan.
The answer is B because it's saying how he would basically sacrifice his life for his country meaning he is a devoted American
B. A treatment's effects spreading from the experimental group to the control group.
<h3>Why would a control condition be used in an experiment?</h3>
When conducting an experiment, a control is a factor that doesn't change or is unaffected by other factors. It acts as a benchmark or point of comparison against which other test results are assessed.
The spread of the treatment from the experimental group to the control group is referred to as diffusion, and it has the effect of minimizing the difference between the two situations. When a group that has not previously received therapy hears about the care the other group is receiving, it expects the same or comparable care.
To know more about experimental group visit:-
brainly.com/question/23389356
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