Intellect was an important part of an empire and the Tang had many achievements in this area.
Answer:To Prevent Bias which may arise from a major difference from personal characteristics.
Explanation: Sampling is a part of a population that is to be used for a research or experiment.
Variables are factors or members of a sample or Population that are can be altered (Dependent variables) in order to create an effect on another variables.
Independent variables are variables that are consistent and are not affected by other variables.
To Prevent BIAS,proper Sampling or inducing independent variables it must include all the factors necessary in an experiment or research.
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British law made it a punishable crime to possess salt not bought from the English factories.
While the Indians were ruled by the British, they were not allowed to posses salt any other than the one produced and procured by the English. The indians were forbidden by law to not own such or process their own salt. People who did this illegally were caught and beaten down for breaking this law.
B. Until the invention of barbed wire, most stock fences in Texas were actually living hedges, the osage orange bush being the most popular.