How does Van Helsing prove to Dr. Seward that Lucy Westenra is one of the "Un-Dead"?
A) By showing Dr. Seward the bite marks on Lucy's neck, indicating a vampire attack.
B) By presenting evidence of Lucy sleepwalking and exhibiting strange behavior at night.
C) By revealing that Lucy's health has rapidly deteriorated despite medical treatments.
D) By demonstrating Lucy's aversion to religious symbols and her fear of garlic.
