What’s being done to the brake fluid in the above photo?

A. Checking break fluid weight
B. Checking to see if the brake fluid is too thick
C. Checking viscosity
D. Checking to see if the brake fluid is contaminated
please only answer if know for fact or took penn foster tesat

Whats being done to the brake fluid in the above photo A Checking break fluid weight B Checking to see if the brake fluid is too thick C Checking viscosity D Ch class=