20 points hurry

In paragraph 6, why does the author use the word hobbled to describe Dr. Heidegger as he went to get the book of magic?
A) to create an image of Dr. Heidegger's movements
B) to illustrate the eeriness of the book of magic
C) to encourage the reader to snicker at the doctor
D) to show that Dr. Heidegger's study was very crowded