Your question isn’t finished you have to give us the answer choices
I believe your answer is B.
A. The bubbles are lighter than air.
B. There is matter that cannot be seen inside the bubbles.
C. The bubbles will burst before long.
D. The bubbles cannot be broken into smaller pieces.
The first question it would would release the same amount.the answer to the second question would be the experimental group.
D. The particles are tightly packed together
