I think the anwser your looking for is b.
<span>Its important not to have fingerprints on the cuvette when using a spectrometer because by using a spectrometer one measures the amount the amount of light that the solution in the cuvette absorbs at a certain wavelength. This tells you how much of the solute is dissolved in the solution. So if you get fingerprints on the cuvette, this could interfere with the light absorption and cause your readings to be incorrect. </span>
Answer:
A system of government in which the chief executive is constitutionally independent of the legislature (I guess)
In all three areas ethnic minorities are trying to achieve some degree of autonomy or independence. In Quebec the movement is peaceful and political, and some people are now satisfied with protected language rights within the Canadian confederation while some still want independence for Quebec. In Xinjiang the Uighur minority wants independence from China; due to lack of political options the movement has used sporadic violence and terrorism to achieve its ends. Only in Chechnya has the independence movement spilled over into civil war with terrorism in other parts of Russia.
Naturalization is the process through which a foreign citizen or national can become a U.S. citizen.
