Which research sources are examples of secondary sources? Select two options

Was american neutrality between september 1939 and december 1941 a tragic mistake

In shifting to a defense policy based upon the concept of "flexible response," president kennedy was indicating that he had grave doubts about thevalue of which previous defense policy? a massive retaliationb collective securityc containmentd air power

All native american time were united against their struggle with the european settlers true or false