Which of the following best states how the open door policy affected china and other countries doing business there?

Assuming that this is referring to the same list of options that was posted before with this question, the correct response would be the last one, having to do with the fact that after this policy was implemented, there were practically no restrictions on which European country could do business with China, since no nation wanted to "miss out". 

It’s both true and false

Ibelieve b because alexander graham bells wife’s and mother was deaf. hope this you out