Answer:
was not a new energy source that was developed to power the new machinery
The correct answer is letter A
Open door policy is for the exploration of imperialist territories. According to this precept, all major capitalist nations would have equal rights when carrying out the colonization and administration of their territories. In this way, the climate of competition and distrust would be reversed.
Apparently, American politicians believed that the liberal principles of free competition should be respected in this situation.
The infant cannot tell the differences between the habituated stimulus and the new stimulus.
