Oh hey there ain’t nothing lol I swear to my sister in my house and my mom and I are so scared of it all over there so we. Yea
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.