How many states became part of usa when benjamin harrison was the president?

What would lead a historian to consider two events to have a relationship of correlation rather than causation?

How did tyrants attempt to gain the approval of common citizens?

It can be inferred that the dramatic increase in defense spending by germany was the result of. (a) attempts by great britain to take german colonies. ( b) fear of a two-front war against france and russia (c) the need to put down a communist rebellion (d) a competition with the allies to produce atomic weapons