Help! What is the function of Catherine and Heathcliff's burial location?

a
Their burial at the wall of the church cemetery reinforces their inability to be accepted.

b
Catherine is buried in the moors and Heathcliff is buried at sea to signify their eternal separation.

c
Keeping the location of their burial a mystery is a Gothic element the author uses to create suspense.

d
Located at their respective familial homes, their graves represent loyalty to family.

e
Their joint burial in the moors is symbolic of their wild and passionate natures.