I would believe the answer to be (a) since the effect has to do with wind force movement
<span>Afar, Amsterdam, Anahim, Ascension, Azores, Balleny, Bermuda, Bouvet, Bowie, Cameroon, Canary, Cape Verde, Caroline, Cobb, Comoros, Crozet, Darfur, Discovery, East Australia, Easter, Eifel, Fernando, Galápagos, Gough, Guadalupe, Hawaii, Heard, Hoggar, Iceland, Jan Mayen, Juan Fernandez, Kerguelen, Lord Howe, Louisville, Macdonald, Madeira, Marion, Marquesas, Meteor hotspot, New England, Pitcairn, Raton, Réunion, St. Helena, St. Paul, Samoa, San Felix, Shona, Society, Socorro, Tasmanid, Tibesti, Trindade, Tristan, Vema, Yellowstone.</span><span />
Answer:
i would say white because if they were to turn black they would be more visible to predators i believe they have black skin under their fluff .
Hope this helps