The correct answer is - the mass of the egg increased and egg white become somewhat transparent.
Explanation:
The vinegar has acetic acid that helps in dissolving the eggshell and release carbon dioxide and make the egg white somewhat transparent. The other main effect that vinegar has on the egg is to make it bouncy and increased its mass due to the hypotonic nature of the vinegar in the egg that leads to the diffusion of the water into the cell.
Thus, the correct answer is - the mass of the egg increased and egg white become somewhat transparent.