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.
I believe it would be the letter 'C' ;w; Good luck, sorry if this is incorrect.
Answer:
D. The beginning of the Mongolian tribute empire
Explanation:
This changed the sociopolitical because the mongolians went into to cities so they could build an empire destroying and killing numerous innocent people. I strongly think this is the answer because in Baghdad it was the most civilized became ruins in just a matter of days when the Mongolians came.
