Context: Since World War II, aircraft carrier designs have increased in size to accommodate a steady increase in aircraft size. The large, modern Nimitz class of US carriers has a displacement nearly four times that of the World War II–era USS Enterprise, yet its complement of aircraft is roughly the same—a consequence of the steadily increasing size and weight of military aircraft over the years. Today's aircraft carriers are so expensive that nations which operate them risk significant political, economic, and military impact if a carrier is lost, or even used in conflict.

Question: Why have aircraft carriers increased in size since World War II?
Answer: to accommodate a steady increase in aircraft size

Question: How much more displacement does the modern Nimitz class have compared to the older USS Enterprise?
Answer: nearly four times

Question: Why do nations risk significant political impacts if a carrier is lost or even used in conflict?
Answer: Today's aircraft carriers are so expensive

Question: Which era does the USS Enterprise belong to?
Answer: World War II

Question: Why have aircraft carriers increased in size since World War I?
Answer: Unanswerable

Question: How much more displacement does the modern Nimitz class have compared to the newer USS Enterprise?
Answer: Unanswerable

Question: Why do nations risk minimal political impacts if a carrier is lost or even used in conflict?
Answer: Unanswerable

Question: Which era does the USA Enterprise belong to?
Answer: Unanswerable

Question: Today's aircraft carriers are so cheap that nations which operate them risk what?
Answer: Unanswerable