GMAT Critical Reasoning (CR) | Re: Microscopic plants called algea grow inside the top layer of

Microscopic plants called algea grow inside the top layer of sea ice in the Antartic if enough sunlight reaches that layer of ice and enough seawater, which contains nutrients, reaches that layer after splashing onto the surface. Even though moderate snow cover reduces the sunlight that filters into the top layer, sea ice with moderate snow cover typically contains even more algea in the top layer than does sea ice with less snow cover.

Which of the following , if true most helps to explain