why did the u. s. create the open door policy in china instead of just taking over the entire country?

What do u think caused the size of the roman empire to change

An effect of the steamboat's popularity was that fewer people traveled by rail. o steam locomotives became less popular. people began to build canals in the united states and europe. o more people began to travel between the united states and europe.

One exception to the full faith and credit clause is that one state cannot enforce the civil law of another state is required to recognize marriages and divorces in another state cannot enforce the criminal law of another state is required to enforce the criminal law of another state