Why Is Carbon Dioxide Able to Be Stored More Effectively

Why is carbon dioxide able to be stored more effectively in ocean water vs. fresh water?

A) The pH of the ocean is pretty high and so the carbon dioxide is trapped in a neutralization reaction.
B) The oceans are large and so you can dissolve more CO₂ in them.
C) Gases are more soluble in cold water than warm water and the oceans are colder than fresh water lakes so you can dissolve more CO₂ in them.
D) The pH of the ocean is very low and so the carbon dioxide is trapped as an acid because like dissolves like.
E) none of the above