(i need this answered quickly! i will give brainliest if you're answer is correct! and maybe extra points! )

once a triple-beam balance is leveled again by moving the sliding masses, how do you find the mass of the object being measured?
a. use the reading of the largest sliding mass.
b. add up the readings from each sliding mass.
c. move the largest sliding mass over until the balance tips to the right.
d. remove the object and turn the adjustment knob until the balance is level.