why do scientists believe that winters might be milder on the Eastern Seaboard in the future?

a a change in the amount of polar ice will reflect more sunlight toward the eastern seaboard
b a change in the amount of polar ice will put heat from the eastern seaboard
c a change in the amount of polar ice will alter how ocean currents move
d a change in the amount of polar ice will make cold water stay at the poles, warming up the land

c a change in the amount of polar ice will alter how ocean currents move

This is because changes in the amount of polar ice can affect ocean circulation patterns, potentially leading to warmer water being transported towards the Eastern Seaboard, resulting in milder winters.