In what way did the purchase of alaska fit with secretary of state william seward’s foreign policy toward asia?

a. seward thought the purchase of alaska could protect the united states from asian aggression.
b. seward thought that alaska could be a stepping stone to increased trade with asia.
c. seward thought the purchase of alaska would weaken japan and other asian powers.
d. seward thought the purchase of alaska would make it possible to annex midway island.