Samples of different materials, A and B, have the same mass, but the sample of A is higher in density. Which statement could explain why this is so? A. The particles that make up material A have more mass than the particles that make up material B

B. The particles that make up material B have more mass than the particles that make up material A.

C. The particles that make up material B are more closely packed together than the particles that make up material A.

D. The sample of material A has greater volume than the sample of material B.​

B. The particles that make up material B are more closely packed together than apart because that make up material A!!!

C. The particles that make up material B are more closely packed together than the particles that make up material

Explanation:

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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 =