Read the following context and choose the best option to answer the question.
Context: His hand came up almost automatically to rest on her arm , a silent acknowledgement , and then gave a brief squeeze of affection . The cords of his hair were both springy and coarse against the sensitive tips of her breasts . His skin was cool from the morning air , but his inner furnace warmed her quickly . Resting her chin on his shoulder , she noticed the empty bay below . The night before had been dark , all color erased by the moonlight .
Question: Why are they outside without wearing any clothes ?
Options: 
A. The night before had found the two locked out of their house , where all the clothes were located .
B. They had spent the night inside , but decided to go outside for the morning .
C. They had spent the night outside , making love under the moonlight .
D. None of the above choices .


C