Choose C
The other three options are reasonable.
A brief analysis of living in the mountains in early autumn. Living in the mountains in early autumn makes you feel cold and early, and the thatched cottage is frosty and clear. There is a day when the trees are withered and the windows are full of water, and there is no sound. When the fruit falls, I see an ape passing by, and when the leaves are dry, I hear a deer walking. The plain qin machine is quiet, and the sky is accompanied by the clear night spring. As soon as autumn arrives, the Shan family feels refreshed. The frost news that indicates clear weather is also known from early every morning. This is the climate characteristic of mountain dwellings: "There is still three days of heat in the city, and the autumn light reaches the wild people's homes first." The first couplet uses early cold and frost to describe the feeling of life in early autumn in the mountains, which has the beauty of painting in the air. The chin couplet picks out the common scenery of people, "the sun is shining through the window with withered trees, the pond is full of water and there is no sound", and it is written into a beautiful sentence by a skillful hand, which shows the poet's artistic ability to observe things quietly and be good at absorbing them. The first two couplets provide an objective description of the unique climate and scenery in early autumn in Shanju, which pave the way for the subjective reactions in the following two couplets. After explaining the changes in climate and scenery, Ning Lian made subjective judgments on the actions of the animals he saw outdoors.