The unusual about the way shield came to be ruler of the danes is that he is a foundling, abandoned as a baby and turn out to be such a successful king. His funeral was an outstanding and splendid where it was held in the ship at sea and he is bounded by weapons and massive treasure with a gold woven banner.
C) populism
For future reference: an easy way to remember the causes is to use the acronym MAIN (as in the MAIN causes) to remember that they are militarism, alliances, imperialism, and nationalism.
Hope this helps :)
Mostly it was exhaustion, lack of supplies, new diseases (and old disease that became more common.) Also cold weather, bandits, and oxen dying on the trip.
