Because of england suffered a long period of artistic and literary drought.
a. the plague
b. the crusades
c. the norman invasion
d. the war of the roses

I would go with C. I previously answered A but that was unfortunately incorrect.

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).