Which of the following would you need to measure, not because they are a direct measurement of how well something is being dissolved, but because they are relevant factors into how quickly something dissolves?
A. The temperature of the water
B. The size of the solute particles
C. The volume of the water
D. The amount of solute
E. Whether or not the solution is being agitated (stirred)

overcharge is the right answer system

it is given that trillions of microbes make up to 1% to 3% of the body mass.

let's take average of this percentage: 2%

consider the average mass of the human body as 70 kg.

then, trillions of microbes would have mass  

therefore, 100 trillion micro-organisms would weigh:

this is an approximate value and could change depending on the mass of the human body and percentage of the microbes present in it.

average mass per microorganism =