The ignition temperature of sodium is very____i_____.To prevent its ______ii_____ combustion,it is stored under _______iii______. The information in which alternative completes the given statements?

a) i-low,ii-rapid,iii-kerosene
b) i-low,ii-spontaneoues, iii-kerosene
c) i-high,ii-rapid,iii-water
d) i-high, ii-spontaneoues,iii-water​