​A Hard-Boiled Egg Sinks in Fresh Water but Floats in Salt

Multiple Choice

​A hard-boiled egg sinks in fresh water but floats in salt water because:

A) ​salt water has a greater buoyancy than fresh water.
B) ​the salt water repels the hard-boiled egg making it float.
C) ​the fresh water absorbs into the hard-boiled egg making it sink.
D) ​the salt water repels the egg, making it float, and the fresh water absorbs into the egg, making it sink.