Prompt: Water has the highest density at 4 degrees centigrade, 4 degrees centigrade water will 
Completion A: sink when poured into 4 degrees centigrade sea water 
Completion B: sink when poured into 2 degrees centigrade water 
Completion C: rise when poured into 2 degrees centigrade water 
Completion D: rise when poured into 6 degrees centigrade water
Completion B