An iceberg is floating in sea. How much of its mass will remain above the surface of water?

✅ B. Proxima Centurai

✅ C.  Treaty to protect ozone layer

✅ A. red-brown liquid

✅ C. Venus

✅ B. concave lens

✅ B. longest night

✅ C. infrared light

✅ C.  both A and B