Identical Cylinders $1$ and $\backslash (\backslash$mathbf$\{2\}\backslash )$ each have mass $\backslash ($ m $\backslash )$ and are partially filled with different fluids. The fluid in Cylinder $1$ has a volume $\backslash ($ V $\backslash )$ and the fluid in Cylinder $2$ has a volume $\backslash (2$ V $\backslash ).$ When Cylinder $1$ is placed on a scale calibrated to measure mass, the scale reads a mass $\backslash ($ M $\backslash ).$ When Cylinder $2$ is placed on the scale, the scale reads a mass $\backslash (2$ M $\backslash ).$ A student claims that this indicates the densities of the two fluids are equal. Is the claim correct? Why or why not?

Yes, because the ratio of mass to volume of the two fluids is the same.

Yes, because the containers are identical.

No$,$ because the student neglected to account for the effect that the mass of the cylinders has on the scale reading.

No$,$ because the student neglected to account for the total volume of the cylinders.