A Boat Floating in a Large Pool Is Loaded with Solid

Multiple Choice

A boat floating in a large pool is loaded with solid iron bars. The water level at the pool's edge is marked with a red line. The iron is now thrown overboard. When the water becomes calm again,

A) the red line is slightly lower than the water level.
B) the red line is slightly higher than the water level.
C) the red line is still at the water level.