Read each sentence from Mary Shelley's Frankenstein. Based on the connotation, which sentence most reflects a fearful tone?

A The floor was a little raised, so that it was kept perfectly dry, and by its vicinity to the chimney of the cottage it was tolerably warm.
B What chiefly struck me was the gentle manners of these people, and I longed to join them, but dared not.
C I then reflected, and the thought made me shiver, that the creature whom I had left in my apartment might still be there, alive and walking about.
D We were brought up together; there was not quite a year difference in our ages.