(7) such injuries are more often fatal to the cat than to the visitor since most states require the animal to be killed and tested for rabies that the victim refuses to take precautionary rabies vaccination shots..

look at the underlined section marked (7). choose the answer that best corrects this sentence, if appropriate.
a) correct as is.
b) such injuries are more often fatal to the cat than to the visitor, since most states require the animal to be killed and tested for rabies if the victim refuses to take precautionary rabies vaccination shots.
c) such injuries are more often fatal to the cat than to the visitor since most states require the animal to be killed and tested for rabies because the victim refuses to take precautionary rabies vaccination shots.
d) such injuries are more often fatal to the cat than to the visitor since most states require the animal to be killed and tested for rabies although the victim refuses to take precautionary rabies vaccination shots.