You are on a boat in a fiord in glacier bay ,Alaska . It is clear sunny day with temperatures near 20 C with no wind. With in 5 minutes the sky is still clear but the wind is blowing at 30 knots down valley, the sea is fill with whitecaps and the temperature drops to 5 c . A) you experienced a chinook wind. B) you experienced a valley wind caused by cold air spilling off an ice cap dow the valley. C) you experienced an afternoon sea breeze blowing cold air off the ocean. D) a storm front must have passed