help geography im not any good at it?

Asia has over 2 billion people, with an average of 185 per square mile, while Europe has only 460 million people, but averages over 240 persons per square mile.Interpreting these facts means that ______.

a) Europe has a higher death rate

b) The great plagues of the Middle Ages had a devasting effect on Europe's population

c) Europe has a much older population than Asia

d) Asia is a much larger land mass than Europe

e) Asia has the higher population density