Answer:
A. Total mass of each team
Explanation:
The side with the larger mass will end up pulling the side with the smaller mass
I think it is this because compression stroke it needs to be compressed then open up when started.
The frequency of the wave has not changed.
In fact, the frequency of a wave is given by:

where v is the wave's speed and
is the wavelength.
Applying the formula:
- In air, the frequency of the wave is:

- underwater, the frequency of the wave is:

So, the frequency has not changed.
Dekaliter is 10 times bigger than 1 liter.
1 Dekalite = 10 Liters