The roosevelt corollary to the monroe doctrine established which of the following? :
a the right of european nations to forcefully collect debts in the western hemisphere.
b the right of the united states to build and fortify an atlantic-pacific canal.
c the independence of panama from columbia.
d the right of the u. s. to act as an arbitrator in european conflicts with western hemisphere nations.
e the right of the u. s. to act as a police power in the western hemisphere nations.