I would say that World War Two is a continuation of World War One because without Germany losing World War One Hitler would not have been able to take power in Germany. Another reason would be that without World War One Mussolini would not have had the right political climate to take power in Italy.
The right to trade an investment over a certain period of time is called a c)option. It is also sometimes referred to as a compound option. This is due to the fact that the investment being made has two expiration dates (so this gives the person making the investment a given amount of time to trade an investment). It is equally called a compound option because it has two strike prices, so a set price set on the investment.