What are some possible influences of ocean currents on glaciation?

Question

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Ocean currents can influence glaciation in multiple ways: Cold currents can cool the land and, with enough precipitation, help glaciers form (A), but they can also inhibit glacier growth by reducing moisture in the atmosphere (B). Warm currents can prevent glaciation by warming land areas (C) and can also contribute to glaciation under the right conditions by increasing precipitation and snowfall (D).

What Are Some Possible Influences of Ocean Currents on Glaciation