Question

Salinity increases in the ocean around Antarctica when
A. sea ice forms.
B. evaporation decreases.
C. sea ice melts.
D. temperatures increase.

Answer 1

I believe it is A.) "When sea ice forms"
Sea ice contains minerals, as the sea ice forms or evaporation increases the salinity increases. 

Answer 2

I believe it to be when sea ice melts pushing more mineral down of the surface of the ice into the water