The correct answer is C. viscosity.
You can check the viscosity of the brake-fluid with using a voltmeter. You can see that by using the voltmeter and read on it the volts, the bigger the voltage the bigger the moisture in brake-fluid, thus less viscosity.
Credit Card should be the answer.
Between the 1820s and 1850, as more white males won the right to vote and political parties became more organized, the character of American democracy changed. It became more partisan and more raucous, a turn that bred ambivalence and even discontent with politics and the dominant parties.
B. Ethnic Cleansing
Both cases occurred because another race who had more power tried to eliminate the other race.