An Egg Is Placed at the Bottom of a Bowl

Multiple Choice

An egg is placed at the bottom of a bowl filled with water.Salt is slowly added to the water until the egg rises and floats.From this experiment,one concludes

A) calcium in the egg shell is repelled by sodium chloride.
B) the density of salt water exceeds the density of egg.
C) buoyant force does not always act upward.
D) salt sinks to the bottom.