D) Chose
but the other duude explains it better
Answer:
called in
Explanation:
B. Encyclopedia
C. Concise Dictionary of American Biography
D. Dictionary
. . .I always came from my studies discontented and unsatisfied.
I had gazed upon the fortifications and impediments that seemed to keep human beings from entering the citadel of nature.
. . .what glory would attend the discovery if I could banish disease from the human frame and render man invulnerable to any but a violent death!