Answer:
In this passage, the word palpable means D. something one can touch.
Step-by-step explanation:
The adjective palpable can literally refer to something one can touch, as in "The palpable scar on his face made him insecure". In the way it is used in the excerpt we are studying here, palpable still refers to something that can be touched but in a more figurative manner. Palpable refers to a feeling or a sensation so strong that it can almost be physically felt or touched.
In the excerpt, the dank night was palpable due to the strong feeling its darkness caused. It was warm and black, probably even a bit scary and mysterious, so it made a strong impression on the character.