Which of the Following Is True Regarding the Chemical Content

Multiple Choice

Which of the following is true regarding the chemical content of Earth's oceans?

A) salinity varies all over the world,and the ratio of individual salts to each other changes.
B) salinity varies all over the world,but the ratio of individual salts to each other does not change.
C) salinity does not vary all over the world,and the ratio of individual salts to each other does not change as well.
D) salinity does not vary all over the world,but the ratio of individual salts to each other changes.