This is a test of commonsense with single/multi-choices. Complete the next sentence:

A wood cabin and cars going over the snow covered mountains appear, before a crowd of skiers are shown gathered on the mountainside. the skiers

Choices: (a). are held by a man in balaclavas, then shown skiing down the mountain.; (b). begin skiing down the mountains, multiple people in a row before entering an ice cavern.; (c). begin to climb over tall, snow covered mountain walls, before arriving at the top of the mountains.; (d). go down the slope and come to a cover and getting stuck goes down the ski lift and falls on the snow.;
The answer is:
(b).