The chair of hetepheres?

a. is the throne of a famous roman king

b. was used by the queen of sheba

c. now exists only in a picture, as the wood rotted

d. was well preserved by egypt’s dry climate

I thin the answer is D. was well preserved by Egypt’s dry climate

option c (nickel) is not found in earth's crust. the earth's crust basically contains eight (8) elements namely: oxygen, silicon, aluminum, iron, calcium, sodium, potassium and magnesium (listed in order of abundance).