What effect does the imagery that Stoker uses in Dracula, such as the dark castle and animals like bats and

What effect does the imagery that Stoker uses in Dracula, such as the dark castle and animals like bats and wolves, have on the novel?

A.
It drives forward the plot of the novel.
B.
It transports the reader to the Victorian era.
C.
It reinforces the Gothic tone of the novel.
D.
It contrasts the settings of Transylvania and England.