How did john hay, the us secretary of state who proposed the open door policy, respond to the fact that no countries formally agreed to the open door policy? a) he backed down and retracted the united states’ request for an open door policy. b) he declared that the countries’ lack of response meant that they agreed to the policy. c) he asked china to halt all trade in the chinese empire until an agreement was reached. d) he amending the rules of the open door policy multiple times until all countries were satisfied.